DirectAxis (South Africa) customer service really sucks!!

The sales team at DirectAxis is very fast to make you promises, get you signed up, and start collecting their debit order in double quick time. But their customer service team really sucks. I have been trying for 6 weeks to get them to do something as simple as change the date on my debit order, but this is too difficult for them! They leave you with the feeling that DirectAxis has staffed its contact centre with untrained high school drop-outs to save themselves a few extra cents ... ??