Scott bad quality

I bought a brand new Scott 640 Dual Mountain bike a month and a half ago. After my first drive the brakes gave serious problems. I took it back to have it fixed but to no avail. After a month and a half the brakes are still giving me problems. The dealer now says although the avid brakes are the preferred brake system on Scott Bicycles I have to replace the entire break system to solve my problems and this at my cost. I find it hard to stomach that I have to replace the faulty breaks that Scott put on the bike. Do not fool yourself into thinking that Scott Bicycles are quality bikes. You will be better off buying a bike from Game. The quality is the same just at lower cost