[Resolved]  Tata Motors — Car brake bounceback after first service

Hi,
I had bought Tata punch AMT before 2 months. The car condition was good. Th brake and wheels were proper. When I presses the brake, it was not used to bounce back .it was just stopping.

I got the first service done from Yash Motors Naranpura, ahmedabad on 15th March and after that I'm facing very weird issue. When the car is running in smooth road, then also I can feel more that the back tyres' movement. It's not smooth.
When I press the brake, the car bounces back for 2-3 seconds after stopping.
The service center has made my car condition bad.
After complaining to Tata motors also, they talk to me on call like there is no problem.
The Tata motors don't care about customer satisfaction.
Rather than understanding my problem, they asks me about what can be the issue.
Unexpected response from Tata motors even