Myntra.com — Without price tag I received parcel and facing problem while returning

Had order Men Black Solid Reversible Puffer Jacket of size L. that didn't have price tag attached to that jacket but one "TAX INVOICE " was inside the parcel
I needed a larger size and hence raised an return request due to size issues on the same day of the delivery.

Myntra rejected return request and said that without a price tag they can't pick up the jacket. What will i do now?Please solve this issue as soon as possible.
Myntra should have verified the seller or the product before shipping it