Myntra.com — received half product

Address: Lucknow, Uttar Pradesh, 227105

I have ordered a kurta set from myntra and got only kurta, duppata is missing from the package and on the same day they delivered me the order, i have filed exchange for it, mentioning in the comment section that duppata is missing. Now when the delivery person came for the exchange, he denied to replace the product and asked to check with myntra customer care. I have called them and now they are denying to take the complaint as i haven't called them within 48 hrs of receiving the product just because i have written the comment in the section provided for exchange.
Now my rs 2000 is wasted just because of their mistake and they are unable to help me out.

Really frustrating, even i am not able to find anywhere in their faq that i need to call them within 48 hrs for complaint. Really disappointed and won't buying any product now from myntra.