The customer is not impressed with your work, Its value for money.. so do a nice job that impresses the customer

I check at the vitality and frequency of the customer in my/our store and asses the opinion.

when customer keeps making correction to the design we assess complain, we find the solution at the first, if it's not at our level we must orient to... the other staff who is able to solve it more

This shows there's communication breakdown that can only be solved by first understanding exact clients requirements and follow to detail. If you get... to meet all the initial agreed requirements additional charges must apply for further customization.  more