Who is charging you? LW basic is free & Pro costs $18.88 US for 6 months of updates & email support. The only official site for downloading either version is www.limewire.com
It sounds like you've been scammed. Contact your bank/CC company straight away & report this!!

Have a look through these threads for more info. Page 5 of the first one has a list of scam sites.
The second is more about how some people have been able to get a refund from scammers. Good luck

http://www.gnutellaforums.com/showth...threadid=28751

http://www.gnutellaforums.com/showth...threadid=44499