Myntra.com — I received a defective product but they are not giving the refund

We received a damaged product. We requested return on the same day the product delivered, they said that a man will come and pick up the product and u will get your refund. The man came and took photo of the product and went. They said that wait. We waited for more than 7days, after that they said your return request has been rejected. We were very disappointed because this was our first order with mynta.