Bad customer service and poor turnaround time

I am very dissatisfied in the service given by Mercedes Benz head office customer service. I lodged a complaint for my car more than 7 days ago and it is yet to be resolved and no feedback has been given since i logged it. I have no car my car is just parked at their Mercurius plk while no one cares how i move around worst part the breakdown was caused by negligence after servicing my car with their dealership in centurion. They have put my life at risk now they are even inconveniencing my life still. I keep calling and hold for more than 49min to get a consultant. I have been speaking to stanley keletso who now ignores my emails. I also spoke with kedibone. I have no choice but to take the matter to my lawyers