Be careful of this business man

I recently finished a restoration job for Mr. Pieter Grundlingh on a classic car. We did so much extra work for him with no extra charge. When it came time for him to pay his outstanding account he started ignoring my phone calls and WhatsApp msgs. I have also sent this numerous emails regarding his outstanding balance but he said he never received it but the 3 emails I sent him all came back with delivery reports and I sent it feom 3 different email addresses. The one time I got hold of him telephonically he insulted me and called me a '*******' I am a small company and can't afford a loss like this. I hope that everyone in the classic car industry will be warned against this guy because he is a chancer.