Nike India — defective product...but nike store not ready to accept

Address:

New Delhi, Delhi

I purchased Nike flyknit epic react in pink color on 30th April for Rs16000/-
The things at the back which they claim is to provide the support is not of good quality and thus causes me shoe bite whenever I wear. Since April till today, I wore it hardly 4 times because of the shoe bite. 3 weeks back I randomly went to a store and told them my problem and they said you come with the shoe and we will check so I went to the select city walk first floor store from where I purchased the product, he checked the shoe and asked me to raise a complaint to the customer care, and they will definitely revert because this is a genuine case. I did so, customer care replied saying if it is material or workmanship flaw, Nike will replace the product. So I went to the store again and then the same person there said that Nike has not provided a proper reply.
It is so amusing that Nike store is questioning their own service centre.
Moreover that rude person said that you are getting it because of the fit issue.

I literally had to shout it over there to get myself heard.
I wore the shoe in front of them and showed that it is not because of the fit but because of the material of that thing causing shoe bite.
Then one of the salesman understood my problem and agreed that it is not the fit issue.
Still that person names Deepanshu was adamant that it is a fit issue.

Imagine why would a person come fighting after purchasing a 16000 shoe!!!
The worst is I travelled all the way to the mall to get stupid reply and no action.

I am not asking for my money back, all I am asking is for a good pair of shoes. I really wanted a Nike shoe from long and thus I chose the best that was there that time, and It ended up in complete dissapointment.

Nike please reply. Please give a proper reply and maintain your brand value by employing a good staff who would understand.