I bought a used vehicle here and financed it. A we...

I bought a used vehicle here and financed it. A week later the dealer called and said they made a mistake and I needed to pay an additional $50 a month on my loan. I told them no and to take the car back. Then they said don t worry about it, they will fix it. Ridiculous!!
Follow up:
I took it there 3 months later cause car was shaking when I hit the brakes. They said I needed rotors turned, but they were nt covered under warranty. I thought it was covered under warranty for a defective part. Another reason I would not deal with them. Sell and forget!!!!
Customer service manager called me and said he would check into it and call me back in 1 or 2 days. It s been over 2 weeks and he never called me.
Wish I never bought my honda at honda universe in lakewood, nj.
Follow up:
After a second incident with the service dept., the sevice manager offered me a free oil change and tire rotation. He said when I bring the car in to ask for him. So about 2 to 3 weeks later I had to get an oil change, so I brought my car in and asked for the service manager. When I told him he said he never said that and would not honor it and that he never talked to me. So again I say I am sorry I dealt with this place!