Fedex — wrongfully charged customs duty

I received an item worth around ₹2800 approx, just a few hours ago. The problem is it was a gift, i wasn't conducting trade and this isn't for commercial purposes. I've never had to pay custom duties or import taxes for my previous gifts, which were items of the same kind and weighed the same as well.
This time, i was charged ₹2052 that i wasn't expecting at all, and i had to pay out of my savings. Keep in mind, i'm an 18 year old student.
The details can be found in the invoice #: blr-c-236366. I want to be educated about this topic, because it has shocked me. How can a gift be charged all this much? The sender has already paid the shipping charges. Am i not eligible for a refund?