Thanks, all.
I've filed a complaint with both the Consumer Protection Division of the state AG's office and the Better Business Bureau. I've also sent an email to the head of the VegasBBB, which, as I understand it, will be handling the complaint.
I'm going to use the number on the bill to call and get the particulars of my account as suggested, but I guess after that all I can do is hang around and see if this thing pops up on my credit report, right?
Thanks again for all the replies. I didn't believe they could really do anything, but it's nice hear someone else say it. And thanks for the links, Redlemon. I've been typing in names all morning. There's a whole lot of scumbags out there, eh?