I have an advice for you.
Try and get a phone that can record all your conversation while talking on phone e.g Nokia C3.
Call him as usual and record your conversation.
Tell him that you need your QR 11,000; that you gave him the money out of love as a friend and it’s been six months and he hasn’t even made any attempt to pay it back.
Mind you, don’t argue with him on phone, just try as much as possible to get all required information that we help you and the authority e.g Police to help you collect your money from him.