Myntra.com — Not accepting my return

I received my order and on the same day initiated a return request because the size was too small. The courier guy came to pick it up as the package was quite huge, he opened the packet and crumbled the product in his bag. Now myntra has denied the quality check as the tags are missing. They are not ready to listen and accept that it can be their courier teams mistake also but apparently blaming the customer for it is easier and profitable