Poor service - Think twice about banking with them

I was sent a mail from Standard Bank stating that I was granted a payment holiday effective from the date of this mail which was the 2nd June 2020. This I never even authorized for, I however left it and went with it. In August I saw my account was debited and when I call in, I'm told it is a system error that the mail was sent late. How can you sent a mail that says from the date this mail is received and then expect a customer to not make arrangements accordingly. Whether the system sent it late or not, the mail stated from date received. Worst is they tell me they can reverse the payment but then I'll be in arrears as it never went off in May, whose fault is that? I didnt authorize anything and thus didnt even notice this until today when told about it. Thus the holiday was meant to be May - July however through poor communication and doing their own thing, I am now inconvenienced for August.