Non payment for service

Dominic a staff member of Wumdrop phoned me to hire/use my owner driven bakkie for hire asking to use my service I gave him my quote & he said go ahead. I did two trips for him. He informed me that he will pay me the following Monday. Now days later he still has not paid me. I asked for my payment & he said s he had already deposited, days later still no payment. Now he doesn't even answer my calls. My warning to all truck owners