Bridgestone Tyres India — tyre cut in running at slow speed

I have purchased my car in feb 18 and running till date 4600 km. On 12 th nov, while driving in katraj area pune on plain road tyre got side wall cut near the rim. This is a clearly a manufacturing or the design faults.
Submitted the claim by dealer but rejected by giving your silly policy which cant be look like a market leader tyre manufacturer.