Myntra.com — return of shoes rejected by myntra

Address: karnataka, Pune, Maharashtra, 411045

I bought shoes from myntra which was a prepaid package hence it was dropped at my place without my presence.
The packet did not have shoe box and shoes were in packet in poly bag. When i returned it because it did not fit me myntra did not take it back saying that this does not have shoe box.
I can prove also that no shoe box was there but myntra help did not want to listen. The packet cannot hold shoe box, i have picture also but no one is listening.

What do i do now? Can people be cheated so easily?
I placed return on those shoe after 1 day. Where will i throw box in just one day?