Uber India — lost of mobile phone

We lost a samsung mobile phone today morning at around 915 am in an uber go cab while traveling from mysore road to nagarbhavi. We are pretty sure that the phone was left in the car. Driver of the cab was called and he switched it off in the next second aborting the call. We even tried to contact uber india and it's observed to be of no help. Please do the needful in the earliest!!