Myntra.com — Wrong product delivered costing Rs. 4,796 and now not accepting the return request

I placed an order for a Biba Suit costing Rs. 4796. In place of this product, an old, used red male Shirt was delivered to me. Since then I have been raising a return request to pick up the wrong item and refund my money, but unfortunately Myntra is not able to complete the return request. The courier person coming to pick up the item is not aware that he has to pick up a different product.
I raised the complaint to customer care by providing the images of wrong product along with bar code, but customer care declined the return request saying that the correct product has been sent to me from there warehouse. I am a loyal cutomer of Myntra since last 8-10 years, such FRAUD has happened for the first time.
I have written to there Grievance Officer as well, however, there is no response till date.
Strict action should be taken against Myntra for cheating people.