Uber India — charged extra cash

I travel a ride with uber after ride by mistake i made a extra payment in cash by mistake beacause i was in hurry at that time after that i checked my pocket and i calm the driver too and asked him and then driver ignored me and told me that i will call
You later but i have not recieved any call from him. After half and hour i again called the driver and he continouesly cutting my phone. Because he doesnot want to give money back