Unwilling to help

I have paid the required minimum amount and a further amount was debited from my account. I called requesting that the money that was debited be returned as I have paid the minimum amount. I was kept on hold for 30 minutes waiting to speak to the manager Tsholofelo Mathe, spent another 30 minutes explaining myself again to Tsholofelo. I have made it clear from the onset that I'm calling from my phone and cannot afford to be on the line for too long telling Patricia Masonganyi and Tsholofelo. While I was busy talking to her and asking whether she would call me back should the line terminate before we conclude our conversation. She never commit to that and I was cutoff. I bought another airtime call back again and ask to speak to Tsholofelo to no avail and no call back. It's possible to reverse the debit order and I know cause it was done more than once. I do not see the reason why standard bank can't do it.