Worst service ever!!! Contract cancellation never happens

I had 2 contracts with them. One was due to expire November l called to cancel the contract November l was told it will be cancelled by December, December the contract was still active, on the 1st of December l called to cancel again l was told it will be cancelled by January today when called l told my contract was never cancelled, THE BILL HAS BEEN OUTRAGEOUSLY INCREASED!!! and no one from vodacom is willing to resolve issue l get transferred from one consultant to the next until the line eventually hangs up . I'm very much disappointed with Vodacom I'll never advance anyone to take a vodacom contract it's a trap!!!