Mega Cabs — driver took extra money (overcharge)

On 21 April 2018, I was charged RS 550 instead of actual RS 331 by saying that software is not working and this is how much bill comes from Terminal 3 to Terminal 1 of Delhi airport. I took Cab DL1RX7410 and driver was Mr. Prem Singh (Mob No. [protected]).
This person saw that I am in hurry because my next flight was at 8PM and I was at terminal 3 till 7 PM. So for check-in I had only 15 min left. I did not have option to go back to counter and enquire whether it really cost Rs.550. On the contrary at counter I was told Rs. 350 would be the tariff for Terminal 3 to 1.

I complained telephonically to customer care of Mega Cabs same day. But they also did not revert back to me for what action they took against Mr. Prem Singh.