ATMS not working

All the Atms at the mall were not working. They all had a pop up message on the screen saying that the Atm was unavailable as the machine was still trying to connect to the network. This happens in the morning when everybody is in a rush. Totally unacceptable. It was worse enough that all the Atms at the mall were not working but the same thing happened at the nearest FNB at Hendrik Verwoed street. If it wasn't the pop up message, the Atm would go out of order as you used it. Others would take long to respond and then go out of order.....