What to you do if a client of your company made a big complain? What you are going to solve this problem to make the clients happy?

LISTENING FOR ALL DITAILS APOLOGIZE ABOUT SOME THING HAPPEND FROM EMPLOYEE Solutions GIVE HIM SOLVE TO MAKE HIM STASFIED THANKS HIM FOR THIS PROMLES TO STUDED TO DO NOT LET  HAPPENED AGAIN  

Your approach and actions will vary based on what position you are in the company and in what function. A sales contact would handle it completely different from that of customer service or for that matter a senior executive himself for some reasons. 

But in general, one has to clearly understand the complaint first, work internally on what actions can be taken to rectify if this is a genuine complaint.

But before all that, the first and foremost thing is to acknowledge, then apologize to the customer and let them know that you will revert with a timeline. 

First of all, one the guest relations should contact & visit the client, invite him for a drink that he choose and listen to the client carefully without any interrupting, then you should write down all of his comments, and the most important thing is not to blame any side, just to till him that we are sorry for the inconvenience, and promise to investigate & check out this issue, then get back to him as soon as possible, then later you should send him a nice gift, or any invitation for lunch or dinner in a nice good restaurant.
 

first and fore most It is important for me to identify the problem due to which the customer is unhappy.

2ndly, I need to genrate possible alternatives to resolve the problem

3rdly, I should evaluate & select an appropriate alternative ( solution ) that suits to the customer needs & wants  

Last but not the least! Impliment the solution as quickly & as efficiently as possible