Mix Telematics disgusted customer service debiting after cancellations

I am utterly disgusted now, I have sold my Car in July 2020 and Have been trying to cancel my policy since then emails, calls, your system asking for my detail to call me back, because of high call volumes, I have sent numerous emails and have received reference numbers for my enquiry and no one ever contacted me. I have been paying all the time I eventually stopped the debit and then received emails that I will be handed over... but here I am paying for a service I am not getting and have been trying to cancel... If any body should be handed over it is your company on the 4th January 2022. I finally got hold of an operator and she "assisted" telling me that I am liable for R184.00 that is outstanding. Which I found astonishing because of paying for something I no longer had. She then canceled my policy with immediate effect( got the confirmation email) and guess what I am still being debited... Mix Telematics are *****ing from me and this better stop real soon i have all emails of me trying to cancel and ref number. I expect someone in a senior position to get a hold of me. and I expect a full reimburse for 17 months of installments 17x91.68 = 1558.56