[Resolved]  Dell, Inspiron 1525 — Charging unnecessary octroi

I had purchased one laptop from Dell, India. (Office situated in Bangalore).
Delivery address for my order is New D 13/6, NTPS colony, Eklahare, Nasik. (Home address)
At this address we are not charged any octroi as it comes outside of jurisdiction of Nasik Municipality. As even confirmed by courier service they didnt pay any octroi on my delivery.
But still Dell has charged me Rs.1, 908.89 as octroi amount.
Now thought nobody paid the octroi then how come I am being charged for..?
I have registered complaint with Dell two times with all the copies of necessary documents attached (Including one authorized government body letter), still I didnt get any refund or reply from them. This is no small amount. So I will like to get my refund.
Please help me...