Nykaa.com — Received wrong product

I have placed a order on nykaa.com. It consisted of two items.
But i have received another product, which i have never ordered through out my history.

I package was delivered on 20th july evening

I have written mails and raised request to nykaa support on the next day. But have not received any kind o[censored]pdates.
On1st august i received a mail saying, on investigation there is no issue with delivery and cannot hep you further.
The order i have placed is worth 5320 rupees. And received a product i do not use. (Worth only 449)
Please let me know how i can get a refund or the products that i have originally ordered. And pick up the product that was delivered.
Nykaa order number nyk[protected].
The nykaa ticket no : [protected]

I am unable to upload any pics or attachements. Please help to resolve this issue as soon as possible