None of them wants to lose their job or benefits. It's easier to get rid of you by handling you to the next rep enough times to frustrate you. They won't get into trouble for not solving your issue - they did their jobs perfectly.

Financial harm is the single language Amazon understands. Let lawyers talk to Amazon and they most likely won't be thrown around between 1st line reps.

If it’s any consolation the enterprise support guys aren’t any better.

Threatening to move to Azure is about the only move that works.