https://www.siliconvalley.com/2022/12/19/travel-troubleshooter-help-my-tap-air-portugal-ticket-credit-has-expired-or-has-it/

DEAR TRAVEL TROUBLESHOOTER: I’m trying to get a refund for a flight canceled by TAP Air Portugal during the pandemic. In March 2020, while I was in Lisbon, authorities declared a pandemic. On April 4, TAP Air Portugal stopped flying to the U.S.

I tried changing my flight, but TAP wouldn’t answer the phone. So I purchased new tickets to fly home. When I checked in for my flight back to the U.S., I spoke to a TAP agent at the airport, who promised I’d get a refund.