Useless customer care

I logged a quarry when I opened my contract with Vodacom that my debit order should be changed. They told me 3 times over the phone that it changed and just to make sure I went into the branch at Waverley Plaza and spoke to someone there that also told me it has changed. My debit order did not go off yet which means that it has not changed. My second problem is that they did not deduct last month and told me that it will deduct twice the amount it usually does, I cannot do that, I put money aside for my Vodacom and unfortunately life happens and you need money urgently for unforeseen events. So I do not have two months payments, they cant understand that. The customer service is so bad that I do not even want to fight anymore, I just want to cancel with them and go to MTN or something that has better service.