Hi,
You can request the seller's contact info through ebay. The URL for the form is:
http://cgi3.ebay.com/aw-cgi/eBayISAPI.dll?MemberSearchShow
If you still cannot contact the seller, you can file a complaint with ebay. The info for this is located here: http://pages.ebay.com/help/community/investigates.html#selling
You can also file a Fraud Report with the National Fraud Information Center. Their URL is:
http://www.fraud.org/
I hope this helps :-)