I've been taking care of this crazy client, she's rude and verbally abusive when she doesn't get her way and just shouts and screams for hours on end at times. As the CS representative assigned to her account, I can't do anything but continue to serve her as our company can't afford to lose this multi-million account.

I've spoken to management to try and switch but all the other accounts are taken and I can't swap with anyone else. I'm stuck with her but I don't think I can take it anymore. Any tips on dealing with such an unreasonable person or should I just look elsewhere?