Door problems of the 2009 Volkswagen Jetta

Purchased a new '09 vw Jetta sdn 2. 5 l s and the second day I had it, I had to take to service dept. The door seal from drivers door was coming off, the car would smell like burning plastic and I noticed after 3rd trip ( in 2 days ) the rear brakes were "glowing" red hot. They said they could figure it out and said it may be a plastic coating they put on brake pads to keep rust from building up on the ship overseas! after the brakes constantly squeaking and having to take my new car in 2 more time with every excuse known to man , I was mistakenly told it was a defect and they changed them at no charge. My brakes are again going out and it has only been about 6-9 months. The concern is that they have not fixed the root of the problem as well as a seat belt indicator which has been faulty. I have had them make me take it in 3 times for that ( first time they couldn't duplicate the problem, so I was told to bring it in again ) and one passenger side was replaced but it is still happening and I fear that the combined brake and seat belt/ airbag issues could be dangerous! also troubling is in the last few months the drivers side rear door would not unlock by any means for on 3 occasions (the last which I called vw service to make an appointment for and never got a return phone call) the last time it was unusable door for 2 weeks then just started working again. It has not been attended to, but my fear is again, in a accident if someone was back there they may get trapped in car.