Uber Double Charge ****

I requested a ride on the 10th of April. Before the trip, Uber held R452 and charged my account R485 at the end of the trip but did not release the R452 back to my account. My bank confirmed that both amounts were charged. Uber has no phone line. I left messages on the web and App and only got automated replies. When you have a problem with Uber, they are nowhere to be found. I feel ****MED!