Unnecessary charges by uber

From August been requesting Uber rides And their app always have issues It either loads for an hour without connecting you to a ride, but busy saying we trying to connect you And if it does you get a driver that will cancel And you get charged In December had the same issue requested but nothing for over 30 mins, then had to switch my phone of to cancel, when I switch it back on it was still running and connected to a driver wen I no longer needed it And when you contact Uber they tell you the amount it's rightfully app****, for an issue caused by their app and drivers who cancel for no reason. So now 8 have R110 rand charged by Uber for their app errors and drivers who cancel rides and say they coming