Avoid Standard Bank Cresta the last week/ first week of the month

This is now the how many months that the bank simply is offline when you get there. Nothing works. They all offline and when you ask about it they "will be on next month, please go to another center and then perform your business there." Now I simply avoid them. My mother unfortunately with them and she is on pension so now we keep cash for her out and then do transactions later in the month.