Tata Motors — Issue in the break booster with in 15 days

Address:

Hyderabad

Hi,
We have purchased tata tiago xt rhythm manual petrol variant on 27 march and hardly we driven 50 kms and suddenly my car hit the parking pillar because the break system was faulty. When we have given it to service centre they said break booster are not working and there mechanic was saying sometimes the break is working sometimes it's not, they are in a shock how vehicle driven for 150 kms.
My point is why you people are playing with someone else life, if something happen to us then who will be responsible for it, you dealer or service centre people. Now I just want to return the car and i will never ever suggest any one to purchase tata cars.
Now I just want to return the car thats it, tell me what is the procedure.