Unauthorized debit order amount

Being ********** by Telkom and no one is able to assist, I took out a contract more than two years ago and was advised that once the two year period is up, the monthly fee will reduce to the subscription fee only, Telkom continues to debit my account for an higher amount than the subscription fee. I am unable to speak to anyone on their 081 180 number to dispute this matter. Today I get a call from upgrades offering me another product so they can rip me off some more. I asked her if she can resolve my issue and she stated unfortunately not, she only handles sales. I asked if she can log a request on my behalf and her response was no Can someone please call me urgently to resolve this issue or will escalate the matter to the Ombudsman for resolution. Whilst I start shopping for out service providers that offer better customer service to their clients.