You need to document that you sought and were denied a refund (or that you sought and that AM denied).
US card issuers absolutely have this situation in hand. If properly documented, you may well see a temporary credit to your card account within a day or two and a permanent credit in due course. Be sure to have ready or to provide:
1. E-ticket receipt.
2. Proof that AM cancelled.
3. Proof that you asked for a refund.
4. Either a writtn denial or your documentation of a denial or no answer from AM.
DOT expects refunds to be initiated within 7 days, so you can start your chargeback on day 8 if no joy.
Last edited by Often1; Apr 9, 2020 at 12:30 pm