The response from Customer Care is absolutely pathetic. You stayed at one of their branded hotels and played by the rules. The franchisee left Choice, which is not your fault. Choice should have requested a copy of your folio and issued the appropriate credit. That is the customer centric thing to do. I would continue to press the issue. Ask them if they have a mediation or arbitration process. You could also file a complaint through the Maryland Office of the Attorney General Borough of Consumer Affairs.