Given they are playing the game of abusing the customer until they push back or crack, all validated by studies, it is morally right and sensible for customers to play the game on their terms. Get angry quickly, abuse customer service, yell, and make threats. According to this article that is how you get taken seriously by customer service and escalated to reps who will treat you fairly and resolve your problem.

> Some companies now equip call centers with software that analyzes a caller’s tone of voice and pace of speech to determine how upset the person is. Angrier callers get routed to agents skilled at de-escalating conflict