What an absolute joke

We tried buying a car while trading in a car, thus when we went to midstream branch they wanted us to get certificates from Renault before they purchase the car, and this is not in there advertising.. so we sold the car privately want looked at another car, and had absolute no response on it, we eventually went to the dealership again and the car was already sold, frustrated and desperate to get a new car we went to Germiston branch, the sales consultant said to us that the car we are looking at was reserved for another person but the deal didn't go through so he will reserve the car for us, contacting the agent that Monday, and asked about the progress on the car, he told me he is just waiting on approval for finance. An hour went by and he let me know the car was already sold, I asked him to give me the managers number so I can get answers why this happened. The agent first asked me why and when I told him I'm a client I want to talk to the manager due to poor service I was called and he told me that he doesn't like messages like that, finally I got ahold of the manager explained everything to him, thus he was very apologetic and tried helping, he said another agent will contact me and help me asap, so I searched for another car, I found one and sent it through to the manager he said once again an agent will call me, I've filled in the documents sent it to my previous agent and to the manager, thus no progress as yet, so it doesn't help that you have cash deposits and everything they need in line. This place is an absolute joke! I am forced to buy a car there due to me not having a car because I sold it for the car they promised, this will definitely be the last car I buy there, I would not recommend this company, slow service, unreliable and pathetic