Excuse me, I've asked you several times, but I can't know that you paid to us by the original invoice.I would interfere with your help to let us know as soon as possible.
Sorry that I have to ask you to follow a few times, but I can not know for sure that you have paid us with any invoice I bother you to let us know the information as soon as today.
Sorry that I have to ask you to track several times, but I can't know you pay to us with the invoice any version I disturb you to let us know the early days.