Uber India — surge on pool fare

Address:

Chennai, Tamil Nadu, 600020

I have been charged a surge on a pool trip over the upfront fare uber showed. The driver's phone got switched off and he couldn't end the trip. As it was a non-cash trip, cash payment wasn't possible. Now i am facing a fare of rs. 106.9 instead of rs. 59.39 and uber is calling it a surge of 1.8x.
This was my latest trip on 20.04.2018 (Friday) in the morning at 8:58 a. M.