For me it was Comet. Apology for rather long post ahead.
I have a cottage/rustic style kitchen and my fridge resides in purpose built closet, so any replacement has to be of precise dimensions.
Few years ago around Xmas, my ancient fridge packed up. With Xmas food melting on kitchen floor, there was no time to order replacement from the internet, so I popped into local Comet store to find any fridge that would fit. They had one model, at hugely inflated price, in wrong colour, made by brand I wouldn't buy otherwise, but beggars can't be choosers, anything from internet would take at least week or until after new years to be delivered.
Now, Comet being Comet, never have anything in stock. They are like a large internet page, you come to the store to view the item, but they rarely have any at the back to take home, all they have is just single items for display only. And this particular fridge was no exception - none in stock, can order one for you, will be here after New Years. Luckily the half awaken shop assistant checked their computer and to his utmost surprise there was one store, within 50 miles that actually had 1 on display and additional 1 in stock, to take away, right there, right then. Like a wind I drove though the cold afternoon to the remote store, paid the monies, and returned home with the fridge.
As I unpacked it, two things became evident. Despite the fact outer packaging looked virgin fresh, the fridge inside was absolutely battered. Knocks, scratches, bent shelf, massive dent on the side, clearly an ex-display or used item. This made me really angry, but once again - Xmas food in tesco bags hanging outside the window to keep it cold, we had no choice. As we tried to move the fridge into the closet space it turned out the Comet people measured it wrong, they measured dimensions of the fridge door, instead of the actual outer shell of the fridge, which turned out to be about 2cm bigger in each direction, and thus wouldn't fit. To add insult to injury, hinges of the curved door of the fridge were mounted in rather particular fashion on the outer edge of the wall, so the fridge needed extra 6cm of space on the right hand side for the door to even open to 90 degrees. In other words, completely useless to me.
With about 30 minutes to spare, I managed to return to the shop with the fridge, got hold of shopping assistant, who promptly revealed Comet's return policy, which stated that any unpacked item being returned carried 10% restocking fee. Considering they sold me a fridge that was not as described (bigger than dimensions advertised) and clearly damaged/used/ex-display - and now they wanted nearly 40 quid for my trouble, I asked to see manager. I spent nearly 30 minutes negotiating with the woman in her forties, trying to point out the restocking policy made no sense, considering the item was clearly opened before me and there was no way for me to check the item without unpacking it at some point (to which she actually agreed, that even if I unpacked it in store, in front of her, at the point of sale, and found it damaged, it would still be subject to restocking fee).
The whole argument attracted attention of people queuing to the till, and as she explained "restocking policy" with her risen voice, some chap trying to buy two grand plasma started voicing his concern about what would happen if he takes his screen home and finds it damaged or scratched and promptly decided this was too much for him to risk hundred quid over and walked away from the store. The manager got really angry and demanded that my presence in store is now costing them money, so she would have no choice but to ask her staff to escort me to the door. I pulled my mobile out of my pocket and said that if she won't return my money, in full, right now, and any of her staff attempt to touch me, I will call the police. She promptly started yelling for members of her staff to come to the customer service till (to escort me out)
"All I want is to get my money back, in full" I pleaded "you sold me ex-demo, battered fridge that on top of its condition was not as described on your website and in your store. I bought it today, I am entitled to full refund, if not a full refund and some vouchers as an apology! Or I will call trading standards, watchdog and your local press". She lost her temper and yelled " I offered you refund less 10% and you refused it. Now you are scaring customers. Get out of my store. Get out!" and she yanked my arm towards the door.
With hands shaking in anger I opened dictaphone app and started recording (this was before HD video on mobiles). "Can I get this on record" I asked "are you telling me, that no matter what I do, you are going to take 40 pounds of my money away in the process?". She looked p'd off and said "Yes. And there is nothing you can do about it". I pressed stop button, waved with my phone and said - "Now I have you on record, and I have witnesses (to be honest queue to the tills at that point was already heading for exists, I don't think anyone wanted to do any shoppings any more). You tried to handle me, you threaten to throw me out of the store and you want to keep 40 quid of my money when all I wanted was a refund, within my consumer rights". And I started walking towards the door. Before I reached automatic door, she chased me with her assistant. "Is it in the box?" she asked? "Yes". "All the parts and manuals inside?". "Yes". "I will give you full refund, you delete this" she pointed at my phone and then her assistant "and he will help to remove it from your car".
The store was Comet in Crayford, DA1 4LD, I never got managers name, but if I check my old smartphone backups, I'm sure I still have the recording. I hope she never works in retail again.