<< Stick to your guns. AT&T@Home did the same thing to a friend of mine. I called the customer service for her since she wasn't good at English and they said they couldn't refund the last month's payment but agreed to start the advertised promotion from the time of the call, at the time the promotion was 6 months for $20. My friend was satisfied with that. >>
Have her keep an eye on the bill.
I set up an account using the 6 moths for $19.95 offer, and a month or so before the @Home fiasco, they double-billed me the normal rate.
Their response was somewhat similar, "We can't refund your money", and I informed them I'd call the utilities commisiion about it and file a complaint.
The result? A credit for the amount spent, plus an additional 2 months gratis.
Don't let the monopolistic bastages get you down.
I have the current mailer with the same offer, sent even though I have a current account.
(And no, I'm not e-mailing it to anyone. IMO, if you make a request, you ought to stick around to see it filled, not ask for white glove delivery.)