Amazon India — refund is pending since 1 month

Address:

Dadra and Nagar Haveli, Dadra and Nagar Haveli

I ordered a Nike shoes from amazon.in on 9th Dec.2014 sold by :- A2Z ALPHA. Got the delivery on 13th Dec. 2014 but I returned it because I did not liked the color. I returned the product to the seller by 22nd Dec 2014 and I asked for the refund they said it has been initiated but it has been more than a month but I haven't received my refund. every time I call them they tell me just give us 5 days time the refund will b initiated. No actions as being taken so I request u to please take necessary steps. Thank you.