Myntra.com — Received fake product and myntra not providing refund/exchange

Placed a request for smart watch and fake product delivered ... Packing was done as if its seal packed and wrong product inside and not providing resolution... after waiting for 3 week to resolve they said it was seal packed...
Myntra should know there are people playing with such big company name. I called them so many times asking for supervisor and I was called 2 times by supervisor and did nothing just asked me to wait. And later said nothing cant be done