If a person came to you with a complain of your company and after many arguments, customer is not satisfied then what should your do?

There are always ways if we are intend to find one. Always try to put yourselves in other's point of view in order to come up with a win win solution. No customer comes up just to make an argument. As Jack Sparrow says " The problem is not the problem. The problem is your attitude about the problem"

- Remember: Customer is King

- Don't ever try to defend your company by attacking the customer

Then

- Try to understand the problem and its source

- Try to understand what does the customer really wants. What is the minimal compensation that will make him happy.

- After all, your company invested allot to win this customer, so don't  waste the investment unless there is no way to compensate the customer.

- Remember that loosing the company usually costs the company much more than the compensation.

We all should understand that we are in our business because of our customers. After you bring in a new customer then what you need to do is just serve them and they will give you repeat orders in the years to come. You can increase your strong customer base which means you are becoming stronger in your field of business. You have invested lot of your time, money and effort to make him your customer. Even one dissatisfied customer can bring  bad reputation to your company(eg: through social media) I am not trying to threaten you, But I can tell you should always try to keep100% of your customers satisfied. These satisfied customer base will run your business for you.  So even if you will have to bear some losses to convince a customer,do not bother but keep them happy. ( understand that the customers are also reasonable people what they want is value for their money spent)