What a **** of a bank

For years I have been with this bank, but I think today m leaving them, yesterday evening I logged in to my banking app to buy electricity, the app kept telling me to try later and giving error massages, because I really needed the unit I kept trying however the error message kept coming, when I checked my balance I saw the money is going off with bank charges even though I'm not receiving the units. This morning 29.11.2023 I decided to call the bank to explain my situation and request them to refund me because I made 6 attempts because I received error messages, I was then told they will not refund me because the transaction was made a minute apart, sadly the agents I spoke to do refuse to listen even hanged up a call on my ear, I now need to be inconvenienced by Capitec's malfunctioning app that they know very well it does not well every month end. I have been with this bank with their heights and lows I have stayed, today after they refusing with my child's stationary money saying they giving me electricity I don't need for so much because of their fault I'm done!!!!