DIrect Data bad service

Charles, the owner of this company (DIRECT DATA) based in Edenvale, who i have been in contact with since December 2021. the computer box on my car blew. he has been giving me dead replacement boxes ever since then. he even sent out 2 technicians (of his choice) to have a look at the car. both technicians have confirmed that there is nothing wrong with the car but the computer boxes are dead and do not work. he continued to give me dead computer boxes. to prove him wrong. i got 1 of the computer boxes sent for further testing to a reputable company, who confirmed with me that the boxes are dead and they also provided me with a test result, which Charles could not do. i moved to Durban since. i have been coming up to JHB every 3 weeks on his request, stating that the computer boxes have been sorted out. this was at my expense. unfortunately dead boxes as well. i then had the car put onto a truck and brought to Durban. it was repaired within a week. he now has blocked me on whatsapp and from receiving calls from me. i also sent his sms's, which he ignores as well. he does not want to refund my money. due to his bad service. bear in mind he has sent out 2 technicians which he has chosen to have a look at my car. both technician have said that he supp**** me with dead computer boxes. i wonder if he does this to all his customers. take their money and cannot sort the problem, then decides to block them on whatsapp and receiving calls from them. very bad service, Charles if you see this message, please refund my money. Direct Data based in Edenvale. terrible service