Horrible Uber experience

What on the good green earth? This is my first horrible experience with Uber, and boy, is it a bad one. Last night I book an Uber accidently as a cash payment but for some reason it deducts the money from my uber credits which I had bought minutes prior. Yet the drive still had to be payed in cash. I logged a query frustratingly through the help centre on the app which is honestly insufferable. They have no call line! Hoping it could be settled in the next couple days I tried to put it out of my mind. But it doesn't stop there! Tell me why do I get home and have a R500 taken from my account for Uber one annual when I am subscribed to Uber one monthly which is R50? Ivm stuck speaking to their stupid, ill-conceived help centre that limits the parameters of expressing your issues. So far I've had wonderful drivers this issue is not with them but instead with the company itself and their app. This is ridiculous. They recommend I should go to my bank. My bank says its a problem I need to solve with Uber. Honestly I am super disappointed. The double R64 charge for the trip last night was one thing but to take and entire R500 from my account? I have a graduation coming up for crying out loud. I need every cents I can save! Do better Uber. I expect to be contacted soon. Why do you guys have no contact number? This is pathetic!