Limewire is not charging you that to be sure. You must have bought Limewire from a scam company, and you are not the first. see at least page 5 of
http://www.gnutellaforums.com/open-discussion-topics/28751-membership-warning-beware-download-p2p-clients-only-thru-official-sites.html
You are being charged fraudulently, and your credit card company should be told, and MAY reimburse you.
Failing all else, cancel your card and get a new one with a new number.
http://www.limewire.com is the only place to obtain Limewire. Basic is free and pro costs US$18.88 which includes free e-mail support and pro updates for 6 months.
Sorry to hear of another victim, but I hope this helps.
Oh and please don't double post. It does not ensure a better response, usually the opposite..