Still deducting money from accoumt

Been trying to get a response from Vodacom for over a month regarding my Internet contract that I cancelled in july. Vodacom is still deducting from my account every month and every time I phone they either cut me off or transfer to another department. Was on hold for over an hour last week only to be cut off once again. Nobody can give definitive answers. Pathetic service. I have 5 contracts with them. Cell c buy out looks good at the moment