I. Introduction
The customer service is one of important part of marketing. According to Adam Smit “Customer care is the bridge between the manufacturer and the consumers" However, the failures of some companies are not interested in customer service; it leads to the backs of customers with the products or services. In 21st century, service providers and gradually grow to become an industry favourite, promising. The services link between manufacturers and customers, and the impact between these objects. Manufacturers through the provision of services to customers, and receive feedback from them and meet their requirements. Customers through service providers say their desire to manufacturers. On the other hand the customer care is always a necessary requirement in the business of companies. Today, customers want to be treated with courtesy, respect and hear the heartfelt thanks. Therefore, a successful company not only provides good products for customers but also this company need professional customer service system. The report provides the good customer service of John Lewis, it shows the company's efforts to meet the demand of customers. Besides, through this project I wanted to go into quality customer care services of Viettel Telecom like a bad example. This report indicates causes and consequence of poor quality of service Viettel Telecom. From which, I provide a few suggestions and recommendations to the company may improve the quality of their customer services.

II. Summary of John Lewis's customer service
1. Overview of John Lewis
John Lewis is a one of the biggest chain upscale department stores operating throughout Great Britain. The company is famous for great customer service. Companies are always concerned about the needs of customer; they always create the best choice for their customers. The company's employees are trained professionals that