Dear Sir or Miss,
I am writing to you to make a complaint about the delay of paying and ask for improvement.
Nowadays,we have business with many people and some of them may be very familiar to us,so the first impression is very important.When we first work together,we have made a deal that as soon as we complete our work the money should be paid.At first,you had been good for several times,but now it has been worse and worse which makes us begin to reconsider our relationship.We also need money to pay our employees and other fees so that the delaying of payment makes us not very pleasant.
When we choose to work together with you,we hope we can have a long term cooperation with you and we have been working hard on it.We hope you can make timely payments in the future,I hope we can cooperate happily
Yours sincerely,
LiMing