My complaint:
My flight was cancelled due to COVID-19 and Mastercard declined to continue a dispute even when the airline said they had received a charge back (i.e., they never got paid). Because the airline received a charge back, I was not even able to use credit for another flight.
Although I requested an investigation. Mastcard closed it and declined to continue despite changes in circumstances and events (e.g., COVID, charge back, etc.). In short, I just lost $784.40 for no flight or credit but Mastcard still got my money (because I know the airline didn’t).
Suggested solution:
They should have issued the $784.40.
