Myntra.com — myntra.com refuse to return or exchange product after mistakenly collect myntra insider point

Address:

Pali, Rajasthan, 306912

Myntra refuse to return or exchange product after mistakenly collect myntra insider point.
Even they don't show any return policies when clicking on myntra insider point.
There is no exchange or return is there
The product size is not fit to me, its look too bigger in size.
If you don't accept return but atleast exchange the size.