customer service
noun [ U ] uk/ˌkʌs.tə.mə ˈsɜː.vɪs/ us/ˌkʌs.tə.mɚ ˈsɝː.vɪs/
(UK also customer services)客服部
the part of an organization that answers customers' questions, exchanges goods that are not satisfactory, etc.
顾客服务
the fact of treating customers in a polite and helpful way, which is considered an important part of running a good business
They're a huge company, known for their terrible customer service. 他们是一家巨大的公司，众所周知他们的顾客服务一团糟。