Giving me your name or email address used for paypal might be a start O_o Send me a private message.

The websites you donated for could be either http://anime.thehylia.com or http://downloads.khinsider.com If you do not recognize any of these websites, and you have never been on this website (FFDownloads.com) then somebody has unauthorized access to your credit card.

Paypal is a system that protects the buyer. I cannot make an unauthorized charge to a credit card, its simply impossible, as I never even have access to credit card details, and there is no "bill this guy again" button. In fact, I can't charge a credit card through paypal PERIOD, as a seller I don't have an option to enter credit card details and charge a card.

If somebody has gained unauthorized access to your credit card, the only foolproof solution is to call your bank to cancel it and get a new one. You might want to check up with people close to you first though.