What will you do if you receive a direct complaint from a client ?

simply listen,concern and solve the problem 

ask them about the complaint and try to solve the problem

1. I will apologize.

2. I will do my best to keep the client calm and try to let him/her know that I understand where the frustration comes from.

3. I will offer options to resolve the issue.

listen to customer very carefully to know the details then i try to find a solution from my side if  i can not i should escalate it to concern team .

At first: Listen well to the customer , Determine the type of customer problem and the reason and The quest to solve the problem

First of all, be calm and don't get panic. Approach the client the way you should be. With all due respect i will ask client what is the problem and give my very best to solve the problem. If problem can't be handled form my side, i will ask an assistance from my superior and let us sorted out the case/ complaints. Asking for a sincere apology for the inconvenience caused to client is necessary in order to maintain a good relationship between the client and the staffs salesman/ salesperson. Be in positive and courteous manner as always.

Knows what is he's or her problem regarding the product or service. Ask what he wants, apologize for the mistakes and inconvenience. Agree on any replacement or additional on product or service.Give what he or she wants, and don't forget to give thanks. This complaint is our tools for us to know our opportunities so that we can deliver more great customer service. Thank you.  

I'll listen to him and try to make the best option for him a solution by my offers that available between my hand