Incorrect Billing And No Assistance From Vodacom

I had a 24 month contract which expired December 13 2015. My November 2015 bill had a higher amount compared to what I had been paying since the contract started and this is before the contract expired. I call Vodacom customer care on the 5th of December 2015 to enquire about the outstanding amount and cancel the contract and I get no answers as to why my billing changed. I call customer care on the 8th of December to cancel my contract and they can only cancel on the 31st of December. I call again on the 9th of December to enquire about the random figure in the bill. I get tossed from department to department and one agent called Raymond says he will call me back with answers and I am still waiting. <br> I get an invoice on December 14 with an amount for the subscription I cancelled and I call again to ask for an explanation and a correct bill and still noone assists me.