Nykaa.com — PrettyCat Front Closure Push Up Bra - White- Return policy is misleading

Item link: https://www.nykaa.com/prettycat-front-closure-pushup-bra-white/p/652631?ptype=product&productId=65263...⇄

I bought this product online from Nykaa(https://www.nykaa.com/) and I am facing size issues, item doesn't fit. This item doesn't show up as non-returnable, it says :"Guaranteed replacements/refunds available for any unused/sealed products within 5 business days of delivery."
When I tried to return it, the customer services executive(Pritam R) on chat said they won't accept the return because of the pandemic, then why didn't they mention it as non-returnable. They are ignoring my queries. Worst customer service. This is a new way of doing fraud. Not even providing refund. I am now left with a useless product.

Please help. I have attached screen shots of the chat with the customer service. My complaint is also about the customet service agent whom I had the chat with. This is not the way to deal with the customers.
Thank you.