India Post — custom duties to high for my protein parcel

Address:

Mohali, Punjab, 160062

Hello, i ordered myprotein instant oats (7 package of 5kg). My order was sent in two package. The first one arrived, it contained 4x5kg bags and they ask me 6701 inr of custom duties but there is no proof i have to pay this (Paper is shredded) and normaly, the tax on import should be around 48%. Of the price of my order (About 5300 inr).
Is it normal the custom tax is so high? The hscode for proteins should be hscode = 35022000.
How is it possible the custom fee is so high then?