Thats nothing in 2007 I went to Ocuk spent 2.5k on a system few days later the hx620 corsair blew, obviously I returned it to the shop, I had to pay for a replacement while the ocuk tech needed to test it.
I was a bit pee'd off that they charged for a replacement but as I'd just spent so much cash on my machine I needed a psu, so gave them another £100 that was 5 years ago to this day they never gave me my money back or let me no if the psu was faulty I phoned them twice a few weeks after it all happened I was made to feel like I was at fault and I should write everything down.
Never got my money back or got the psu replaced. The guy I spoke to on the phone made me feel like a thief and was trying to steal a psu off them. Wish I knew of 5UB back then I'm sure he would have helped me out.
My advice do not spend another £400 your never see that cash again, I never got my £100 back and the money and psu have been lost for ever.
Really? this is just bad, based on what you said.
And more importantly, one shouldn't need to know 5UB to get satisfactory customer services.