*********** Call Centre Agents at Absa

I have experienced the worst Customer Service at Absa Call centre , I called in earlier in the month to have my Debit order for Vehicle finance changed and i was told it was changed and i called again a few days before the 25th to confirm that it wil go off on the new date i have changed it to and the agent told me it has been changed but it did not go off on the25th, then i send an email to say the debit order has not gone off and i just get sent an email with banking details with no explanation nothing then i get sent another email stating that there was no debit order set for this month. And that the Debit order has been set for today 31st but it still has not gone off. So what does a person need to do to get proper assistance from the Call centre.