Don't you get it. You were scammed. You bought LimeWire from a scam site LimeWire basic is free to use as long as you want. How on earth do you expect us to know the phone number of the scam site you bought LimeWire from.
And no you cant preview files before you download them. You can do a Bitzi look up on them before you download them though. The link below will tell you how.
http://www.gnutellaforums.com/showthread.php?t=57128
If I were you I would do a little studying before you use LimeWire there are allot of fake files and Viruses out there. And from what I have seen so far from you, you are very likely to get one. You should check out the link below before you use LimeWire.
http://www.gnutellaforums.com/showthread.php?t=61035