********** billing on Account closed in 2020

My nightmare with Tracker has been ongoing for almost 2 years now..I had a Tracking device on my VW, I sold this vehicle in March 2020 day before the lockdown, afterwards I called Tracker to close the contract but no one answered so I then sent an email to ***, I did not get an automatic reply from this email so I thought it was an email that someone reads surely. Around November 2020 Tracker indicated that I have an arrears amount of R645 for unpaid premiums from April 2020. I indicated that I sold the vehicle and sent an email to them indicating this since I couldn't reach them via telephone, the consultant said no one attends to the email address i used and if I want to cancel I need to pay the arrears amount of R645 and early cancellation fee of R1200 for the remaining months on the contract. I thought this was tough because I did my best to reach out to them during hard lockdown be as it may I took this on the chin and decided to pay the arrears for tracking a vehicle that I do not have. On 3 December 2020 I received the settlement letter and on 4 December 2020 I paid the settlement amount of R1845 and sent notification to *** as per instruction on the settlement letter. To my surprise in April 2021 Tracker debited my bank account and when I queried this, they initially said the amount of R1845 was used as an overpayment on my account and now that the amount is used up they are continuing to debit me. I was baffled and I referred the consultant to the email with the settlement letter and instructions to close my account and payment of R1845 she then apologized for the confusion and confirmed that my account is closed. Great ,I thought this was over but no in March 2022 Tracker debited my account again and this time they said it is because I have roadside assistance with them and I get peace of mind knowing that me and my family can always call them when we an emergency..I was so angry and couldn't believe how that this nightmare is still going on, and I was convinced my personal details and bank account are just being **********ly used by Tracker and I have no protection whatsoever( POPIA act please help me)..I never took up any other contract with Tracker after cancelling the one in December 2020 and the consultant said she has logged an investigation into this matter and will get back to me, to this day I am waiting for the outcome of that Investigation, I wrote an email to *** in April 2022 reporting this matter and attaching all payment documents and settlement letter and I have received no response and my account continues to be billed and debited. My only relief is that my bank is able to reverse these unauthorized debit orders when they go off but I am really tired of this now as I have to wait almost 5 business days for my money to be reversed and why should I go though this for a contract I cancelled. I just want Tracker to write-off whatever ********** amounts debited on my account after 4 December 2020, delete my personal details as they have no business having them as I am no longer a customer of theirs and with this horrid experience I will never ever be a customer again, thank goodness there's a lot of competitors in the market for vehicle tracking and I wouldn't wish this experience on anyone.