UBER FUNDS NOT REIMBURSED IMMEDIATELY after Driver Cancels

This was by far my 1st and Worst Uber experience Ever. Driver William accepts my request, texts me on the app 5sec later to ask if I'm leaving the area (1stly cant the drivers SEE where the client it heading to on the app?). Then he cancels the trip (why accept in the 1st place then). Uber deducts the funds ( which happened to be the last funds on my card as I was heading off to work this morning. Thinking they would reimburse the funds immediately as always and I request anther ride, then receive a message on the app insufficient funds!! So they deduct R112 and R8.50 from my account this morning at 07h36am It is now 11:22am and the funds are still not available, How UNSAFE is this, imagine I was not home and reliant on my last funds to take me safe home and this happens this is PATHETIC and I want answers!!!!