I'm sorry to say but you've been scammed. There's no one time payment. Pro costs US$18.88 for 6 months worth of updates & email support. Basic is free. The only place to get an official, clean version of LW is www.limewire.com

Here's some info on membership, scams & how to get your money back
http://www.gnutellaforums.com/showth...threadid=28751

You need to contact your bank/CC company & report it.

Good luck