I'm not saying that you can't complain about the old man's grievance, but what kind of grievance does it have to be? It's a matter that the other man didn't swindle. You report the mobile number of the other man, in case someone harasses the other man? Can you afford this responsibility?
Who is to blame? Can't blame the old man himself? I have to bear the consequences of my mistakes! Why should the person who gets 200 yuan of telephone bill return it to you? They say that you gave them 200 yuan for the phone bill. Why should they pay you back? Just because you cry on the Internet first, everyone has to sympathize with your old man?