i had a very bad experience with richer sounds regarding my sons tv. after 8 months of use, he switched it on one day and it went bang and wouldn't work. we took it to the shop and they sent it off to repair and it came back 2 weeks later and they hadn't fixed it because they said we had damaged it ourselves. i tried calling the shop i bought it from, head office and their repairs team, but to no avail. it was only when i took the tv and stood outside the shop on a saturday afternoon and told all the customers going in and out about their 'service' for 20 minutes that they finally gave in and refunded my son.
i guess the moral of this story is that you have sent it back for repair and it has not been sorted and you are within your statutory rights to have a refund (see:
http://www.direct.gov...sumerrights/DG_182935
and:
http://www.moneysavin...ghts-refunds-exchange
for the specific bits of consumer law you are protected by. be firm, try calling head office if you don't get satisfaction at the shop itself; and failing that, make a complete pain in the @se of yourself if you have to. i have done the standing outside shops with faulty goods a few times and it always works in the end. good luck to you and go after your refund! x