Myntra.com — My refund has been stopped

I ordered a pair of carlton london shoes and received the package on 28 October 2020. I opened the package and found out that the shoes were in bad quality. They were quite dirty and appeared to have been used. So I made a return request the same day. Next day the package was picked up and later I got a message from the company saying that my refund is on hold because the item I returned didn't pass their quality check. I returned the item exactly the same way I had received it. It was already of bad quality. They must have checked before dispatching it to the customer. Now, they won't refund. That's preposterous.
I request the company to see through this complaint and resolve it.