Then I would write them a demand letter. Notify the State Attorney General of their state and the better business bureau. I would get screen shots of the site in case it goes down
They cannot legally enforce a cancellation policy you are no means of reviewing. On the other hand they know you will not take them to court.
Did you put it on a credit card? If so I would protest the charge on your credit card.
Also my answer depends on the particulars of your case BUT you just made generalizations. For all I know you cancelled today for tomorrow and they kept your deposit.
DETAILS would have been nice. I am always suspicious of people who complain without giving particulars
