Nike India — issue with nike running shoes

Address:

New Delhi, Delhi, 110017

Hi team,
I had bought top variant of nike running shoes last year around feb2017 from saket mall store for aprox rs. 13, 000.
The shoe was working fine for 5 months after which it's right leg pair started giving trouble plus the shoe got some stain which was not going even after wash. I went to the store, but it had shifted and the new store did not entertain because they could not find my bill. I had gone abroad for few months and again went there as the shoe started to worn out from the back. They said we can't solve this issue as it's a franchise and warranty period is only 6 months. I went to the store again last month and they asked me to write a complaint online.
I am attaching the pics of that shoe. Please look at the condition as it is giving me shoe bit from the back. I understand i went to the store after 6 months, but the problem was apparent only after 6 months. Plus, thee original store was closer and then i had to travel abroad.
All certain done, i don't expect that if i buy shoe from a brand like nike that too it's top variant that costed me 13k, would not last for even a year.
Please help me!