Myntra.com — Rejection of Return Request for a defective product

Website:

Myntra.com (Myntra App)

I recieved a defective pair of shoes and for the last 10 days I have been trying to return them but for no reason at all they keep rejecting my return request on the very last date of expected pickup.
The shoes I recieved were of the same leg and of different size one of 9 and the other of 10. There was dirt on both of them indicting that they were used.
I have created 5 return request until now but no has come for the pickup. Every time I recieve a message that my pickup is scheduled today, but no one contacted me and no one came for the pickup. The same thing has happened 5 times. Yesterday again I have created a return request and the new issue number is IN[protected]
Kindly help me please!