Tyre complain

I bought a car highly priced, and the tyre is now damaged, asked the sales person to sort it out and all of a sudden it is supposed to be my problem now, a brand new car with less than 100km and already I have tyre issues, the car is always in the garage and is charged in the garage, just driven it for less than 200m, in a secured gated community where there is little to none littering, there is absolutely no way the tyre can get damaged from the car always being in the garage, I cannot spend over R8546 for a Michelin tyre while the car is brand new and has less than 100km it's a brand new car and it can't be that the tyre got damaged whilst in the garage, that is highly impossible, and in a gated community the road are well kept and there are hardly no pot holes or obstruction to and road infrastructure, this is utterly a disappointment and it can not be a matter of recklessness or negligence, however the tyre will have to be bought because I can't have a car that has faulty tyres and highly priced, I refuse, BMW SUCKS AND IT WILL REMAIN TO SUCK