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Can I Have My Missing Items From Nykaa

I placed an order on Nykaa.com. It consisted of 4 items. I received some of the products on April 1st .
 
The email regarding shipping details for remaining products was sent by April 2nd. Only half of the items ( 2 out of 4) in order number : 600302792 have been sent via Delhivery courier. No shipping details about the remaining items.
 
The Delhivery courier tracking page is BLANK on typing the order number : 20815228215. This order number was supposed to give tracking details for remaining items.
 
I have sent a complaint on your website twice. But I have not gotten a response yet.Please look into this issue immediately. Also, inform me about the current location of missing items.Also please inform me of the steps you will take if you can\'t find the rest of my order.
 
Submitted by: Nimesh Master