Wrongfully debited

In October I was called by an agent from cartrack offering me addition protection i.e. Towing, fuel ect. The service was offered for a price of R55. When contacted by the agent I clearly stated to her that she should call me in November as I wanted my account to be debited then only. The agent assured me that the debit would only take place in November so I agreed. A pro rata amount was charged for Oct as well as the fuel debit taken out at the end of the month. Since then I have had over 20 calls from agents I've asked each and every one to escalated my enquiry but not luck. The company states at the beginning of each call that calls are recorded but for what reason is issues cant be reviewed and rectified. I have emailed a team leader Megan Dwawood and asked for call backs but no one seems to do their job. My next step is to totally block the debit order