I bought an audi A6 2000, with high miles, I got it inspected by a mechanic and he said everything is fine except for the breaks which run for about 800 dollars. Ok, I did the brakes, then it started making noise, it was an expensive repair, they said they needed to change the timing belt ($1,500). Another noise started, a clicking noise in the back right, at first they said it was a leaky hose, then they still heard the noise and said it was a damaged boot or something like that in the rear axle, this costs another $1,500, have I been scammed by these people? Is there anything I can do?