请帮我看看我这句话写得对吗?

题目

请帮我看看我这句话写得对吗?
I have checked the system that the billing is still outstanding.Could you please ask client send the payment copy to me,and I will check with Finance Department.
中文背景：
我已经查过系统了,这张账单还没有付清.你能让客户发个付款复印件给我吗?我会去和财务部复查一下.

答案

I have checked the system,and the bill is still remains outstanding.Could you please ask the client to send a copy of the payment to me?And i will check with the Finace Department.