Nike India — manufacturing defects

I purchased a nike shoe 'Nike Zoom WINFLOW 4' on 3rd Feb 18 at a cost of Rs 7995 from M/S Sports station Tezpur in Assam. The 3rd day after purchase when I went for running, I developed severe pain in my left palm. There was no twist, no injuries but pain was unbearable. When I saw and touch both the pairs, I found there is difference between the pair of shoes. The central part of left pair is raised more compared to the right one. I consulted orthopaedic who advised me to change the shoe. When I went to the showroom, they denied to exchange and told to write to customers care. I want now to exchange the shoe or refund. Please resolve.