Bad service and unfair treatment at Westvaal Polokwane service center

On the 23rd of December 2022 I took my vehicle for service at Westvaal service center in Polokwane. When the service consultant give my key after service, I notice a sign on dashboard written "service the vehicle" I immediately alerted him about the sign and responded by saying the computer cannot detect the fault. On the 10th of January 2023 I took the car back to him complaining about the sign and the technician again said the computer cannot detect the fault. I explained that the sign worries me as it was not there when I brought the car for service. On the 11th of January I called the service center manager to complain about the issue again and that there is a funny noise coming from the engine. He promised to look at the matter and come back to me, an hour passed without hearing from him that is when I called insurance to help in towing the vehicle to Polokwane service center, when I was 2km to enter the service center, the technician called me to ask what was happening with the car and I responded by saying iam about to enter the gate. I really believe that should they attended to the situation thoroughly so immediately the problem could not have escalated to this point. The treatment was so bad that the manager refused to borrow me car or arrange a driver to take me home onthe said day. My vehicle is still at their workshop and is affecting me negatively so as I am now struggling to do my daily routine work as my job requires a vehicle daily. They should be accountable and repair my vehicle