Nike India — nike shoes of bad quality, returned but did not get the exchange product

I took the nike shoes from the nike showroom in elante mall, chandigarh. The shoes got torn in 3 months due to poor fabric used by nike. We contacted the people in the showroom and returned the shoes. After 15 days, we went to take the refund/exchange of the shoes but we were shocked by the rude behaviour of the staff. The staff did not have any variety and told that we do not any pair in the shoe you returned. These people behave so nicely when you go for purchasing the shoe and you find a totally disgusting behaviour when you go with some problem. The staff said that we are doing a favour on you that atleast we have returned your shoe. I never expected this from such a big company. We are very disappointed and we would like that we get our money back as it is totally a waste to invest money on nike.