Reebok India — Reebok Run Gazele shoes damaged within 3 months

I purchased Reebok shoes from an authorised seller through Flipkart on 08.09.2023
The shoes are damaged within less than 3 months.
When contacted Reebok they said it has 3 months warranty but I have to contact Flipkart only and take denial mail from them if they are not doing.
Flipkart says they are only seller and any warranty has to be done by brand and they won't provide any denial mail.
I have purchased costly shoes trusting this brand and with less than 3 months of basic usage the shoe is damaged.
Reebok has to provide warranty on shoes when purchased through authorised seller whether online or offline.
They are denying stating random reasons.
I have a valid invoice and my shoe is damaged with basic use only.
But Reebok wants to provide warranty only after receiving denial mail from Flipkart and Flipkart don't want to provide that.
Reebok has to provide warranty on their defective items.