Bridgestone Tyres India — Tyre got burst!

Address:	Jaipur, Rajasthan, 302021
Website:	www.bridgestone.co.in

I bought Toyota Fortuner in Jan 2018 with Bridge Stone Tyre about warranty replacement in case of any fault other then Tyre Physical Damage due to rough usage.
After the total driving of 5000 Kms the rear left tyre got burst on clean clear highway, in the speed of 100/KMPH, after that I have contacted the Toyota & they called to Bridgstone inspector & after the insection Bridgestone company told that the problem is due to the hard hitting of some object and can not be consider under warranty claim.
I was simply driving the clean highway and there wasn't any hard hitting on the road, and I can see clearly that company is trying break the warranty and want me to buy new tyre after 5000 Kms running of new car,
Can you please assist me pro