Reliance Trends — Denial to replace/return defective product

Address:

1St Floor Sandhya Tower Dangratouli Chowk Purulia, Mall De-Cor, Ranchi

Iwould like to register a grievance regarding a recent purchase I did from a Reliance Trends Footwear shop in Ranchi.
I bought a pair of shoes from the shop, and after wearing them for just 1-2 days, I noticed a manufacturing defect in the shoes. There is improper stitching in both the pairs in the heel area which is causing shoe bite. Just after minimal use, there were cuts and bruises on both of my ankles.
I took the shoes to the shop and demanded a replacement since the item was defective, but they told me to wait for around ten days while they tried to resolve the issue. I notice that the store owner took a few photos of the shoes, but the defect was not visible in those since it's inside the lining of the heel area.
Upon calling them up today, they have informed me that they will not be able to replace the product since the "product team" has denied replacement. He also said that he will not be able to retrun them since he cannot sell them to another customer. I asked him why he wanted to sell defective shoes to another customer?
I am now left with a pair of shoes which I cannot wear due to the defect, and basically they are useless to me.
This kind of after-sales service is abysmal and is not expected from an established brand like Reliance.
I would like you to look into this matter with priority and take some action to either replace the defective product, or issue a refund, or at least issue store credit worth the same amount.