Nykaa.com — The product is not delivered either not returned my amount

Address:	Rps colony madangiri, new delhi
Website:	Www.nykaa.com

I have purchased 9 items, That total cost me Rs 6211 and order I'd: NYK[protected] from nykaa online website portal on dated 6 April 2021.
In my order, one product was missing so I tried to raise a complaint to their customer care but they denied taking my complaint. One of the items (L'Oreal Paris Volume million lashes waterproof mascara) get missing from it and it shows delivered. I have raised a complaint via its Customer care number. But they denied raising a complaint. Kindly take necessary action on it and help me to revert the amount of the product to Rs 630/-.
One item has been delivered on 6 April and the rests items delivered on 8 April but Mascara was missing and they denied to raised my complaint and said I can't do anything what action you want to do you see by yourself, I can't register your case.