Myntra.com — received an empty box without the product.

I received a sealed myntra PACKAGE WITHOUT THE PRODUCT INSIDE.
I ordered a Dhruvi gold plated earrings priced ₹321 and it was a PAID IN CASH ON DELIVERY.
The customer service is of no help. There's no email I can send a Video to. Myntra can't just avoid and not look into serious matters like that.
Pls help me with necessary action.
Also let's get people aware how fraud myntra is.