Where did you buy from & how much did you pay? The only official site for downloading the basic (free) version or Pro is www.limewire.com
If you bought from a scam site, you should contact your bank/CC company & report it. They may be able to cancel the transaction for you.

Have a look at the 2 stickies below for more info

Membership? - **BEWARE** - Download p2p Clients ONLY Thru Official Sites (click on link)
(page 5 has a list of scam sites)

Get your $$$ back!! (Music Members)