Ajio — Refund not received

It has been over a month when I ordered a product from ajio. After waiting for over 15 days i wrote to them about delay in delivery. They replied that the product won't be delivered due to some issue from their side so they would give me the refund. But now it has been more than a month and I still didn't receive my refund. I have sent them over 20 emails and have not got any positive response from their side.
How do I get my money back?