Nykaa.com — Products are missing from my nykaa order

I order products from nykaa worth rs 1927 and from that 2 products worth rs 1525 and 399 are missing. I also created a refund request and they rejected the same saying that as per them the products are delivered from their side. I lost my money. Please help me get my hard earned money back. Iam a loyal customer to nykaa never expected such cheating from them.