Limewire is totally legal....But what you choose to download may not be...
It is illegal to download files that are copyrighted...
What the Scam company promised you was a legal App, but what they dont tell you is what you choose to do with it is up to you...
They have no right to charge you for something that is free...
My suggestion would be get rid of the copy you purchased through them as it also could be full of spyware, get your money back and download limewire from the official site http://www.limewire.com
Once you have done that have a look around at the stickies at the beggining of the Open discussion forum and get to know what P2P and Limewire are all about...
Cheers