SOLD A CAR WITH MECHANICAL ISSUES AND DID NOT SAY!!!

On the 15th of December I bought a car from Melrose Toyota, I was dealing with a guy called Martin Moholola and can you believe till this day(29/12/21) the car (which I want to start a business with) is still not on my name and it was bought cash. sadly after I had bought the car I had to personally pay for the change of ownership which is not included when they advertise the car, so you will only find out of extras when you get to them on your expense. What ticks me off is that the car now has a problem(mechanical)everyday I have to call Martine and do follow-ups for the change of ownerships and the issue of the car. I have only sued the car for 3days. what's worse is that everyday I am driving from PTA to Melrose to try and get the car fixed (my expense again) which I am assuming they pretend like they fixing but they are not and say everything is fine then the following day I have to go back to them because obviously the car is not fixed. I have had the worst experience with them and will definitely not recommend them to anyone, what's worse is that Martine just told me that he is going on leave so in other words I will be left to solve the problem on my own. I am extremely disappointed in Toyota Melrose. Be careful guys!!!