Horrid Service Delivery by Agents

I purchased a new vehicle in July on the day I went to pick it up via my insurance we called Mix Telematics and asked how to proceed with a cancellation. I was informed i should send an email to ***. to this day I have not had a response instead I have been debited again this month ( I reversed the payment). I called the accounts department to query why I had been sent a message stating I owed twice as much as I had reversed, the first consultant ignored that question the next said I had already been invoiced for the month of September. This means that my cancellation request has still not been actioned. on the 29/08/2022 I was told a Lungile was busy with my cancellation but she did not pick up her phone, today (30/08/2022) the agent I spoke to said they could not see any history regarding a cancellation request. I mentioned Lungile and he put me through to her once again no answer. another email was sent to *** no response there either. Is there no turnaround time? no confirmation of cancellation and final invoice date? I cannot keep paying you until I get answers. what is unfortunate is the new car I purchased also has one of your trackers. you are very quick when installing the devices.