These actions go far beyond airlines. Almost any monopoly based utility I have had to deal with over the years exudes an air of superiority even though the customers are paying their salaries. You understand, “We don’t make mistakes!” Only the idiot customer is at fault...Yes, even on this day did I experience this snotty, aloof, superior attitude on the part of a financial clerk toward a customer when their screwed up system once again failed, but it wasn’t their fault. Thanks for letting me vent!
If the local manager won’t help you, call corporate headquarters - customer service or marketing divisions.