Hi
If they still dont give you your money back, go through Small Claims Tracker you can do it online.
I have used the Small Claims procedure twice, once where a company was stating that I didnt return a book, and charged me £30 for it so I had to pay £30 to them, took them through Small Claims and got £117 back.
Another time I used it was as an advocate, the gentleman I advocate for, I got him moved to a new nursing home, becuase the home he was in wasnt caring for him, however the old home "lost" his specialised chair (cost £2000) and television (cost £200) they fobbed me off, so I took them through small claims, go the Baliffs in and got his chair back and a cheque for him for £350 for a new television.
Sorry to digress, just to show, small claims tracker is a great tool.
Also consider, Trading Standards, DEMSA, FSA.
Good Luck!
Stu J Byron