What will you do if there is a bad customer and you are a public relation (pr) how will u deal..??

First of all I have to listen all his doubts and complains then I will try to clarify his doubts and misunderstanding otherwise will try to avoid him and close the topic by any way I can.

First i have to hear all what customer say and understand what he need, second i try to make him understand what we have exactly to do step by step and that we just want to make him more safe with us

first bad customer means bad circumstances for him so just understand what is wrong by listening very carefully and start to go through the issue with him so we can reach to the most satisfying solutions to him.

ok ,,, you don't mention on which level he is a bad customer 

if he didn't respect me or my organization i will kindely apologize for serving him , any other badness i can deal with and stand him as long as possible ,,, cause it is my work