Poor communication

Absa internet banking fail to send notification when they gonna do maintenance which make it impossible for me as a client to do my business. This is not the first time that I need do some urgent business and they busy with maintenance. When I call for assistance the person that is supposed to assist just say there is nothing they can do... is this the way clients should be treated? I have been seeing various things on facebook about Absa rebranding and allot of hype around it but not a good start... they should rather put more energy into keeping their clients happy as that is their priority.