I've worked for this agency three times now. The i...

I've worked for this agency three times now. The implementation itself worked well, but there were two problems with the payment. Although both times I sent the bills by post to the right address, I had to wait six weeks for my money. When I realized that the others had already been paid, I asked and it said that my documents are incomplete and there is no invoice.
It is also difficult to reach someone who helps you ...