My driver took cash from me to the tune of 50 dollars for a ten minute ride. This was after bringing me to his friend at 7-11 who was working the counter and trying to pocket the money I gave him for Green Dot load of $250 toy card. He then intentionally drove me around in circles and then to the wrong location chain for my hotel. I want my money back he said it would be fine if I gave him cash to run the extra errand and when I didn't have less than a 5p on me after all that he said no change! What can you do?