You could also try www.consumeractiongroup.com for advise and steps, including template letters to send to your bank should you try to reclaim the charges.
I'm currently reclaiming �2,500 (yes, I know) from Barclays and after 1 or 2 letters they offered me �1000. I can issue a small claims through the courts to reclaim the whole amount which is almost (not guaranteed) going to be settled by the bank before it gets to court. You should give it a go, lots of people have done so successfully, including friends and family so I know it does work.