thanks for the advice. 10 minutes on the phone, did not have to ask to speak to a supervisor and refund back to my credit card. .You could call and ask to apply for a refund now. 800-221-1212 is the number I called. The agent could not issue a refund so I asked to speak to a supervisor about applying for a refund. She was able to issue the refund immediately. I had the confirmation email in my inbox before the call ended.
I have a large credit balance on my Delta Gold Amex, no reason I couldn't use that card to book with another airline if I wanted, right?