Debit order failure

Here I am having to complain about the same thing. In December I complained about FNB not debiting my account for the covid loan. Everything was "resolved" and I was debited in January but left with arrears for December. They have failed to debit my account once again and now I'm 2 months in arrears. I have made transfers into this account previously but it takes almost a full month to be allocated to the account. I just cannot understand why a debit order is so hard to set up. The worst part is that their consultants no longer call you when you're in arrears, they have some silly automated voice message that gives instructions on how to pay. I don't see why I have to keep begging fnb to debit my account.