What is the best way to handle a misunderstanding between an angry customer and an upset staff member?

The problem related to past ! i.e., what did you do against upset staff member, how to make him effective member, how to make him communicate effectively, ....

Dis-engage them and put each one at ease to be able to identify the root cause and plan to handle it effectively.

first hear  customer what he intent to.whether what made customer angry..its employee liability to satisfy customer

1. as it is so hard to handle with angry customer as it is so easy to solve his/ her problems.
2. before you do any thing remember that : the customer (( is always right )). 

3. Actually the custome he is not angry with the Employee or the officer he is displeased with the performance of your services or the prducts, informations not complete enough.

    

4.  be The listener to the customer, hear him well and give to him your attention off course he need to who can listen to him, and make the customer feel that you're listening to him well, show to him that you understand him and don't say to him you're wrong, take care your eyes and hands action.
5. apologize to customer and be sure he accepted your apologise. 
6. find the solve to his problem: all of that is not enogh you should find the solve and ask the customer after that is he agree now...