Stay away from Mix Telematics Africa - Matrix

I have had an account with Matrix since before April 2011. I assume that their product is of world class quality, but fortunately I never had reason to test that. The problem comes in with their admin and financial section, and this has been an issue for many years. On the last call to them, I gave up after 48 minutes. The "press 7 call back" feature does not work either. I changed my bank earlier this year, and sent numerous emails with the new details, but all this was ignored, and the debit order against the old account was dishonoured. I then paid the amount by EFT, and continued to do so for the next 3 months. At the beginning of July 2022 I sold my vehicle, and cancelled my account 292679 on 18 July 2022. I received 3 references in this regard from them. At the beginning of August 2022, they deducted a further payment, and upon actually getting through to them, I was told that there is a month notice period, which I accepted. I never knew about this, as you never receive correspondence or information from them. On 27 August 2022, I received an email from Mixtelematics, confirming that the account has been terminated. I assumed this would then be the end of it. I forgot who I was dealing with! On the 1st of September 2022, a debit order went off from my new bank. A debit order I had never authorised, as I had been paying them by EFT from this account, and they clearly picked up the details from there. On the 3rd of September 2022, I receive an email with an invoice for the September 2022 monthly SUBS! What will it take? The reason I went with another company for my new vehicle is not that their product is better, it probably isn't, but the fact that your admin, financial and customer service is really, really poor.