Uber India — overrated for the trip

I have booked a trip from pannaselayout nagpur to gandhibaug nagpur. It has shown 307 rs as the approximately fare for trip. I could see the 320 rs in his screen but i could not see the fare in my app. At the end of the trip driver demanded 426 rs. He explains this is because of surge. But at the time of returning the same trip is charged as 147 rs only. Even though if surge is there it is very very high charges demanded by driver. Also at the end of trip i am not able to see the fare in my app.