Bank app charges bank account and do not receive airtime bought

To Whom It May Concern I see on hellopeter that it is a not so seldom occurrence of the bank app charging the bank account with the money for airtime, but the airtime not reaching the cell phone of the person buying it. This happened to me 4 times today.27 September 2019 I bought R100, R100, R200, R12 (as I thought that the money perhaps did not register) respectively and did not received ANY of that airtime. I am not happy. Do not take my money through your app and then leave me with nothing to show.I do not want to donate R412 for a bank app that does not work. For that measure, I do not want to donate any money at all. I want R412 airtime shown and available for use on my cell phone as it was intended. Kindly assist here, as your bank is the best I have had the opportunity to be a client of, and I cannot understand why this part is not working correctly.