What (not) to do if you encounter an angry customer within customer service

This is a tricky question that has gone hand in hand with customer service probably since its birth: When a client gets angry, starts yelling and behaving in an almost aggressive manner, what should the company rep do? On the one hand, the “customer is always right” rule applies, but on the other it is not possible to tolerate intolerable behaviour on the part of the customer. Here are several pieces of advice on how you should behave if the client starts yelling at you.