Scam for house plans

I asked Thendo to draw a house Plan for me last year and this year I asked if he could change the plan for the master bedroom and he promised me itl be done 2 weeks ago. Now he is ignoring me after I had told him I am meeting with my project manager and Thendo no longer picks my calls. He has turned off read receipt on WhatsApp but my phone shows when he reads a message and doesn’t respond it. Last time he picked up and told me his girlfriend took his phone I mean this is really unprofessional. All I want now is my R800 rands back because I do not trust him enough to give him more money as he will run off with it. Thendo do refund . I want people to know this guy cannot be trusted he is a scammer and a fraudster