Myntra.com — Not Received 5 Products(all are prepaid) from Myntra

Myntra was supposed to deliver me 8 products in one packet, all products are prepaid.

But I have received only 3 products, and for all 8 products they have marked as delivered in their APP.

After delivery I checked the product and talk to the delivery boy that I have not received my all products 5 are missing, he told me that whatever he had with him he has delivered it.

Within delivery of 15 min I raised complaint to myntra about my undelivered 5 products.

Below are my incidents number for my complaint on Myntra
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For 8 days I was in conversation with myntra customer care about my undelivered product.
Myntra customer care is saying that they will not be able to help further as according to them they have delivered the product.
But I have not received the product and am not ready to accept what Myntra customer care is saying.
Either I need my product or my money back.