Vodacom is the worst

I cancelled my contract on the 21 Nov paid the premature cancellation fee and thought wow that was easy... nope not that easy. I called on the 19 through to retentions and asked for a quote to pay off my phone. I was send a letter via email and was told that the last debit order will go off 25 Nov. No debit order went off and I was not contacted by vodacom until I got a call from their collections dept demanding a payment for my arrears? Is this the kind of service that vodacom is giving all their customers or am I just special?