Telkom theft via debit order

I cancelled my month to month plan and was told there would be no more billing. When I was billed again, I reversed the debit order. Now Telkom re-instated the debit order, after telling me there would be no more charges, and then charged me a fee of an extra R212 to redo the debit order. I have tried for 2 days to get of someone to resolve this theft. Please help. No call centre numbers get answered and most do not work