帮忙修改一下语法错误.

帮忙修改一下语法错误.
Complaint is the customer’s discontent with the product or service.For customers,it’s the way to protect their benefit.For enterprise,it’s one of their important things for their service to the customer; it will be have a big influent to their business.
What is the purpose of customer complaints?
First,they want their problems to get attention.And then,they want to get a warm reception from relevant personnel.At last,they want to have the high quality of service and make their problem to have satisfactory resolved.

括号中是原来的,句子中是改好的
Complaints (complaint) are (is) the customer's discontent with the product or service.For customers,it's the way to protect their benefits (benefit).For enterprises (enterprise),it's one of the (their) important things of (for) their service to the customers (customer); it will have (be去掉） a big influence (influent) on (to) their business.
What the purpose of customers' (customer) complaints?
First,they want their problems to get attention.And then,they want to be treated warmly by (get a warm reception from 这个是受到热烈欢迎的意思,顾客希望得到相关工作人员的热烈欢迎,好像太奇怪了) relevant personnel.At last,they want to have service of high quality (high quality of service) and make their problems (problem) resolved satisfactorily (to have satisfactory resolved).