Myntra.com — product not delivered and showing as delivered in app

Address:

Bangalore, Karnataka, 560103

I have ordered nayo's women mustard yellow printed kurta with palazzos from myntra on 25th dec, 2018. Payment has been done at the time of placing order only. Order was supposed to deliver on 4th jan, 2019. But now in app its showing that it has been delivered on 28th dec, 2018, but i didnt receive any call or message from myntra or delivery agent about arrival of the product. When i called customer care, she is saying that your signature has been uploaded. But i confirmed very well, no one received order. How delivery agent (If delivered) can give it to any one without confirmation of identity or without calling me.