Tvs Motor Company — I bought tvs radeon which I found defective when I was taking the delivery and returning home

Address:

Prince tvs dealer, belabagan,jasidih road,deoghar,jh, Deoghar, Jharkhand, 814112

The bike looses it power gradually and stops. And do not start whatever way by means of self or kick. on first day when the bike stopped, they changed the battery on the road. Problem didn't solve even after two times the mechanic check at home. Lastly they took the bike to service center changed the carburetor. And now on the 8th day of purchase the problem persists, the same power loose problem.
I asked for the replacement but they refused and assured us for fixing the problem but I ask how many times ??? It's complete mental pressure and I need justi ce.