[The FAA]

You should talk to the credit card on which you made the purchase about this situation. The Fair Credit Billing Act gives you the right to dispute charges made to your credit card for goods that were not recieved as agreed. If your reservation was charged to your credit card and then cancelled without your involvement, that would certainly seem to be goods not received as agreed. I suggest that you call Spirit back and demand that your card be credited in the amount of all charges within 24 hours and let them know that failure to do so will result in your disputing the charges with the CC. It usually takes a credit 3 to 5 days to post to your account, but you can call your credit card and they CAN check to see if the credit has been issued.

The FCBA limits the filing date to 60 days from the date of the first statement on which the charges appeared, so you should contact your card ASAP. The issuing bank DOES have the option to extend this time limit if they wish. The purchase also must have been more than $50 and made within 100 miles of your home address. How the issuing bank chooses to handle this rule for internet purchases is at their disecretion. In any case, it can't hurt to ask them about the dispute. If your issuing bank accepts the dispute, the bank will investigate the validity of the charges. If the dispute is resolved in your favor, the bank will just charge the money back to Spirit and that is that. Good Luck!