Myntra.com — Manyavar Kurtas - unable to get refund

I have purchased 2 kurtas of Manyavar from Myntra.com for Rs 6000. Today when it arrived, I tried both of them and I was not satisfied with the size and the quality of the garments. I wanted to take back refund but the option wasn't available at all.
When I called at call center, they are saying that only exchange is possible. But I don't want any Manyavar product now. I want my cash and I will buy some other brands.
In fact, Manyavar's own webiste itself allows refund within 1-5 days.
Request you to take the product and refund my hard earned money back.