No feedback from Vodacom after numerous quries

I have been trying to get Vodacom to sort out my query from the 25th of Oct. Got a call from some Sales person mid Sep to upgrade my contract that was due to end in Oct. I was only advised that there is will be a R20 additional when I am billed end of Oct since I still had a month left. Then I was deducted an additional R300, my debit order bounced. So as a concerned customer I immediately call them to fix this and confirm why the additional amount. I was told that they billed me for the device for the last month. When I disputed this I was asked to call some number when I called that one was asked to call another one till I was given about 5 other number. So I went to the Vodacom Shop in Centurion I paid the subscription as per my contract and they tried to call some department to log a query for the extra amount to no avail. Eventually an email was sent to Trade Partner Admin on the 03rd and I will get feedback (Still nothing). Then today I get a call from an Angela asking me to make arrangements to make the payment for the outstanding amount when I ask about my query she cannot help I must call some department. Really!!!!!!