Given that they advertised it, I would definitely talk to your state attorney or however the system works in the US, on the grounds of fals advertising. I heard of a story somewhere about a guy who saw a dealer ad saying he could buy a car for 1,000 bananas (an odd reference to money, imo). When the dealer refused to accept the bananas he showed up with, he took action for false advertising and ended up getting his car for 1,000 bananas.

Its worth a shot anyway. Any business who treats customers like that doesn't deserve to be in business.