Did you charge the rooms to your credit card? If so, stop dealing with the hotel company immediately, and contact your credit card company. Look on the back of your statement when it arrives, it should have the customer service number - you can call and request that they fax you a form for disputing the charge.
Once the CC company receives WRITTEN notice that you are disputing the charge, they will remove it from your bill, and no interest will accrue while they look into the matter.
We had a horrible experience with a hotel chain a couple of years ago, a chain that also offered a 100% satisfaction guarantee or your money back. I won't go into details, but I'm not a "I want my money back" type of person except under extreme circumstances, which these were.
I disputed the charge on my credit card - I filled out the credit card company form, and wrote a complete description of the problems I encountered, including descriptions of all of my dealings with the chain in an attempt to cancel the charge to my credit card.
VISA took up the fight, and after 4 months, I was finally notified that the hotel had relented, and that I would not have to pay for the room. It was only a one night charge, but we didn't even stay - we checked out so that we could stay somewhere else.