Unauthorized amounts debited

Telkom has been debiting me amounts that I did not authorize whenever they want to even if its not on my salary date. They attempted to debit R31000 and then R26000. They have never called me to receive my permission for this debit order. When I called them the agents say they have escalated the issue, there's never any feedback. Their management refuses to take calls, return calls or respond to any emails. All agents are robotic with their response, they are told to say that management is in a meeting. I called several times for 4 days in a row and every time I called "management was in a meeting." This is absolutely unprofessional. They are clearly working without. supervision, hence the reason the agents are so rude and ******** and they don't have any form of process. They are *****s.