Myntra.com — I have not received the ordered product and myntra shows it delivered

Address: Rajkot, Gujarat, 360005

I have placed an order of two products from myntra on 4th of august and the order no is[protected]-9664801. There were two products, one is highlighter and the other one is loreal eyeliner. The parcel got delivered on 8th of august. I was out of town since 6th august and came back today. When i opened the parcel today, there was only a highlighter in that, surprisingly loreal eyeliner worth rs 577 was not in the parcel! So i called to the customer care and they bluntly answered that you have to call us in 48 hours of delivery, it is beyond that so we can not help you! This is how they treat their customers? I was not in a town, so how is it possible for me to check the products in the parcel? And it is solely their responsibility if consumers receive their order properly or not! And they were literally told that they can't help in this case! Please help me, it is not a small amount, its 577 bucks!