I am now going to retract my post and say SORRY to Emre. I know he will pay this small sum of less than 650 TL. He has a family (two young sons) and prior to the wi-fi which he had asked others to install, he did a good job for us on replacing my our pool terrace and installing an outside shower. We are happy with the work done for this. I do not want to ruin his reputation or his business (just wanted an overdue payment!)
Emre now says he has lost a big job due to someone on the forum reading about this. If that is correct, please understand that the actual work he did for us was very good - with no problem as to payment for that.