Nykaa.com — fake product of kama hair oil

I ordered my holy grail hair oil kama bringadi, which i have using since forever from nykaa during their sale period. I ordered two bottle since it was on discount and i regularly use this product.
While unsealing the bottle i felt the oil was not the same in terms of smell (Original kama bringadi hair oil has a very strong herbal smell) color and consistency. I already had an original kama hair oil purchased from offline store to i could see the difference clearly.
My nykaa order number is nyk[protected].
And now on contacting the customer care they are telling me that the return can only be accepted in 5 business days.

So do they expect us to buy the products and then check their quality?
Why me as a customer purchasing a product like hair oil would check its quality purchased from nykaa?

I need refund for my purchase