Terrible service

I'm so very disappointed , what a bad experience from prestige Mobeni and used cars manager theesan. I app**** for a car and it was approved . Then the sales person calls me and says the cars sold (omw). I going in the same day after wrk to find out what's going on that manager tells me first come first serve . I made a performance about that but he said he had the same car available jus that it's blue , so I calm down and went to see it . I ended up checking it battery was dead (he said we will put a new 1. I checked the tyres it weren't good he said he will sort it out , and small scratches he said he will sort out. I said ok and we sign for the car .it's been 2 weeks and I still don't have the car and ntn has been done. So I asked but everything sales person said 125 service and cor was done just waiting for the battery. So I said ok what about the tyres car the sales person told me that the 125 service they said it needs new tyres. The manager theesan say cor said everythings ok it don't need new tyres. I'm confused and Im trying to ask why did he say to me he will sort the tyres out before I signed and when I sign for it he says it don't need. I'm so ****ed off with this dealership. I actual want to cancel this car because of this poor service