Telkom not cancelling my contract since April

Telkom still debiting my account while I received a call from Telkom consultant saying she’ll cancel my contract in September, and she did as I noticed they have cancelled their services. In October Telkom the debited my account, thinking it was the money I owed them. But this month I received a sms saying I owe them R2000 while I’m not getting any service. I tried to call the customer service department and they say the cancellation department don’t have a number I can call, they will call me back, but I’m not receiving any calls or email, all I get is their statement. I need my contract to be cancelled asap as I was trying to cancel this contract ever since it expired in October and I have submitted their forms 4 times already, even went to the branch in Cape Gate, Cape Town, I was told they don’t do cancellation, I should fill up a form the same form I filled in 3 times already. I had no choice but to fill it in the 4th time but I’m still having no joy even after their consultant called me and they told me she’ll make it a point my contract is cancelled, but by the look of things, they activated my contract again. Where can I escalate this complaint, because this has been going on for far too long?