Uber India — unknown and high fare charged

I had booked a uber from west marredpally, secunderabad to aparna cyber commune, nallagandla, hyderabad on 17june 2017. During the booking time i was shown a fare amount range between rs 360 to rs 460. Which seemed reasonable amount for distance of approx 27kms for tata indica. At the end of trip the fare shown was rs880. I was shocked and i had written to uber support team who quoted gps issue and updated fare amount to rs 790 merely reducing rs90. Even this amounts to approx rs 30 per km. They didn't explain any basis for such high fare as rs790.
So it means uber will show totally irrelevant fare amount while booking and at end of trip customer will be charged any amount. Which could be even 200% of booking amount. There is no control on such open cheating and unfair trade practices from uber.