Uber India — I paid extra

When I paid the amount to driver it showed processing, the amount was 1082. He insisted me to pay in cash saying he will return it if it was credited to his account. I paid him cash and realized a day later that the amount has already been credited to his account. Now he is not picking up the call nor is he answering to my messages. This is clearly a case of theft and action must be taken for untrustworthy drivers. As for u er doesn’t have a proper customer call service where I can report or communicate this issue