Worst Service and no refund

My Renault Computer Box was sent to Auto Electronics for repair as it was starting and running and then as soon as its temp got high, it it would cut out. It was sent to them for checkup early October 2022, they tested it and said that there is no problem with it and that they are going to send it back, a week later they responded and said they are going to take of the immobilizer part and there should be no further problem. received the box back end of October 2022 and the box did not want to work at all, seems like it was completely wiped.... sent it back to them to fix their mistake early november 2022, and received the box back Saturday 12 November 2022 and still nothing it does not work. We have paid a total of R2300 to auto electronics and courier cost of R1000 and are now sitting with a computer box that does not work at all.

Do not use this business I dont think they know what they are doing.