Uber India — driver cancelling unilaterally after half an hour wait - bangalore

I am a doctor, on the way to attend the patients booked uber yesterday. After showing the car and waiting time of 19minutes, the cab driver arrived to nearby place about 200 meters away after 30 minutes and unilaterally cancelled by going off line. Driver by name sharanappa at 9.15 p. M. He could have refused at the first instance itself instead of making me to wait. If this is the kind of service one would get from uber i s thing i should warn the professionals against relying on the service. Please look inot the matter.