Lists of recommended lawyers:
http://www.gofuckyourself.com/showth...hreadid=102380
http://www.gofuckyourself.com/showth...threadid=63661
http://www.gofuckyourself.com/showth...threadid=92107
http://www.gofuckyourself.com/showth...hreadid=132426
Contact/fax the webmaster and billing companies again. If they don't respond, discuss your situation with a lawyer. The initial consultation should be free. The next steps should be to get your lawyer to call/write on your behalf to expedite matters.
If you don't want to be billed by the hour, you can usually get him to accept a flat fee for resolving the situation. Before the fees start piling up, determine how much money you're willing to spend on this problem. In some cases, a cost-benefit analysis may determine it's not worth it.