very disappointed

I am very disappointed with the service I received from BMW AUTO BAVARIA Midrand. I purchased my vehicle from Kobette Marais last year June in less than 2 months I experienced problems with the vehicle which I was advised I need to pay cash, I went back to Kobette who managed to convince you that the car was just recently purchased and you need to fix the car. When I purchased the vehicle it was on 41KM and the current KM is 54KM.When I purchased the car I was told that all tyres are brand new, yesterday I took my car for the first time for service and I was advised that all tyres are finished, this is in less than a year and all the tyres are finished. Went back to Kobette to find out why I was given false information, she went back to you and you advised that there`s nothing you can do.