售后服务人员英语叫做 customer service representative。
这个词来源于英语 customer，意思是顾客，service，意思是服务，representative，意思是代表。
例句：
"Can I speak with a customer service representative?" (我可以和售后服务人员聊天吗？)
"The customer service representative was very helpful in resolving my issue." (售后服务人员在解决我的问题上非常有帮助。)
"I was transferred to a customer service representative to assist me with my problem." (我被转移到了一个售后服务人员，以帮助我解决我的问题。)