Well, it is worth a try, to get the money back from your card company, or the site. Some have succeeded, but I DO suggest you cancel your credit card as the scammers have your details and can do what they like with them, unless the card is cancelled.
Deleting the Limewire you have, running a virus and spyware scan and downloading the proper one from
www.limewire.com, might be wise as well
Good Luck