Problem with breaks

I bought a Renault duster in December 2014 the vehicle has 25500km on the clock according to Renault is the discs wabeling they tried to fix it by skeeming the discs about 3 months ago. I'm sitting with the same problem now and they expect me to pay for it the total cost is R2500, when I bought the vehicle it was brand new with 0km on the clock.<br> <br> They say the reason why the vehicle is doing that its because I break to much, how can break discs last only for 25500km on a SUV?