Contact the fraud/scam dept of your credit company directly & speak with them. There's plenty of advice here 1.
Membership? - ** Download p2p Clients ONLY Thru Official Sites (click on link), & also page 5 for list of scam sites & where you can lodge a complaint, & further advice about getting your money back, particularly in the last few pages. 2.
get your $$$ BACK!!! (music members)