Making a complaint is quite a simple procedure.

申诉的手续相当简单。

《牛津词典》

If you want to make a complaint, you'd better follow the correct procedure.

如果你要投诉，最好遵循正确的程序。

youdao

If you want to make a complaint, you'd better follow the correct procedure.

如果你要投诉，最好遵循正确的程序。

youdao