Bad account management

Really disappointed at how FNB is managing my account, on the 27th of March 2021 I made a purchase at a restaurant called Cappuccinos for about R550 and again at spar express for R49 in Capital Park and these transactions showed that they've went through as I got the notifications but to my surprise on the 17th of April I get a message from fnb that payment of R550 and R49 has gone through my account. The most disappointing thing is that I'm told there were problems with transactions that went through on the 26th of March , 27th of March and 1st of April and as a customer how are we to know for sure that's the case if you've gotten a message on the day of the purchase that transactions went through? It's really weird and it's honestly thievery from the bank. Again I'm told I should check and i will see the transactions only went once. It's not about going once or twice, it's about managing your money and budgeting correctly so you don't find yourself spending way more money than you have. I'm really disappointed at how fnb is managing my account.