A lot of responses are slightly misguided.

Most every single time you interact with consumer service, the reason for as well as resolution is logged. That's why a FF with a petty complaint who calls once or twice per year gets a voucher or miles tossed his way, whereas persons who call frequently eventually get nothing. It's also why I've advocated for more than a decade that "compensation" threads on FT -- which generally seek to determine every single complaint you can make and everything everyone else has gotten -- are stupid.