This has happened to us , more often this year. . FA in First has the ability to compensate you directly while still in flight. We had issues with seat and IFE . FA tried to help and we both gave up.
I mentioned that I would have to contact customer care for some type of compensation. “ last time this happened, I was given $25 discount code to our mileage accounts”. FA took my hint and showed me how he is able to do it with his onboard device. Codes were in account upon landing. I believe he used Good Samaritan ($25) code.