We've booked the tickets specifically because we were promised a refund in case the situation with coronavirus changes. A week later we had to cancel the flight. Then suddenly we find out that they've changed the refund rules and no longer return the money but instead give a certificate that is absolutely useless to us.
We tried calling customer services. The customer service representative was rude and the response was: "It is not our problem. The rules have changed a few days after you bought the ticket, so take it or leave it."
It is a lawless company that does not respect its customers. They can change the rules any time they want without a warning.