Getmecab — Charged extra than what was initially told

Address:	New Delhi, Delhi, 560036
Website:	getmecab.com

I booked a cab from 25th march - 27th march(3 days).
Order id -- orban0274473
Travel from: bangalore to pondicherry and back

The total cost they said would be kms*10 + toll tax(To be paid by me at the toll booth) no extra charges apply.
My total kms was 825km so i should ideally pay 8250rs( i already paid the toll charges at the toll booth).
Now here is what i was charged by the driver on force.
Kms - 825*10= 8250
State tax = 800*2 = 1600 (Since i crossed two states)
Driver bhata = 250*3=750
Service tax = 468
Total amount that i had to pay = 8250+1600+750+468= 11068/-
Additional amount i had to pay from what was asked = 2818/- (Which is 34% more of the amount inintially told)

This is a straight cheating done as a part of availing the service