FWIW I was given incorrect advice on luggage size by a phone agent a few years back. I was stopped at check-in, the whole plane boarded while I was held back with head office finding and listening to the recording. 20 minutes before take off the green light came through that indeed the phone agent had incorrectly approved my oversize luggage. Luggage and I were both rushed onto the plane.
Moral of the story, in writing is better, but Aegean are pretty good at keeping their word even if it's over the phone. Not sure many other airlines would have gone to the trouble of listening to call recordings...
*It was a door. 😂