I also find the support from these types of shops is shocking - twice i've been burnt now when trying to sort out problems with my phone, and it looks like it's going to happen a third time. They just don't care.
I remember going into P4U once to look at phones. PAYG ONLY, I didn't want a contract. Unfortunatly they wouldn't take this for an answer and repeatedly tried to get me to sign up for a contract. Offering me free line rental, money out of the till, all sorts. All I wanted to do was look at the phone and have a go on it, and see if it was any good. They told me they wouldn't do that as I was "only interested in PAYG". I had to say I was interested in a contract, go through a load of forms before they would let me play with the phone in question.
Oh, and after having a go with the phone, I got up and left.
And twice i've been done over by CPW. First time was when I went to get a data cable for my 7360. The person sold me the wrong one, then wouldn't give me a refund, instead insisting that he could order in the correct one. After keeping me stringing along for 3 weeks, and even then ordering the wrong cable, they still would NOT let me have my money back. When I got upset and told them I wanted a refund, the guy had the nerve to tell me not to be "aggressive"!

In the end I just gave up, it was only a tenner.
As for the second time, well they sold me a phone that has a pretty serious fault and then refused to help me at all, instead telling me that unless I could replicate the fault there and then, I was on my own (the fault was intermittent, and sometimes could go for days without happening). I could have decked the **** in the face. I'm currently in talks with Nokia over the problem, luckily they're more helpful.
I won't be buying from either in the future, I hope they go out of business, pushy *****.