Worst experience with a dealership ever

I'm write this review again for the used cars manager (THEESAN) at GWM Haval Mobeni( prestige motor ) . Me and my wife purchase a car and HP and when we got approved for the car we wanted , the manager told the sales person the car is sold some1 came and put a deposit to buy it cash. I asked him y did this happen cause I already app**** for the finance for this car that we wanted . He told us first come first serve. I was shocked cause I came first and that other person came after me. I put up a perform and he did not care. I managed to calm down and he said he has the same car just different colour. So my wife said since we already approved and she don't want to not take a car ,she wanted to see it. We saw it and was happen but we told them about the scratches, battery was dead and the tyres weren't good and the manager said he will sort it out (so we were happen and went to sign the paper work). It's been 2 weeks going for 3 and we still waiting for the car . The sales person said it went for 125 service and said some thins Need to be change especially the TYRES and it also went for cor. Know the manager is saying that the car passed COR and he does not need to change the TYRES. Know it's become a fight back and forward abt the tyres. He said to me and my wife that he will sort the tyres out but know his saying it passed COR and does not need. I'm so very ****ed off cause he should of said he want change tyres before we signed. What principles does this dealership have really wow (worst experience every) And imagine I still haven't received the car and it's been like 3 weeks.