Unauthorized debit orders and harassment from cartrack

I have been with cartrack for 2 Years paying R298.54 monthly. 1st April 2022 my car was in an accident and was written off. I notified cartrack but I was told the only options I have is to pay cancelation fee which is +-R1600 or pay the remaining term. I then requested a downgrade as I'm paying for a car that doesn't exist anymore which they offered me to pay R150. End of the month they deducted R180 instead, 2nd month same story so I then inquired.. I was told that I am paying R30 device maintenance fee in case the device could get damaged. This was not mentioned on agreement and also the car doesn't even exist to start with. The following month they still did the same thing.. I called to enquire then they promised to investigate and will get back to me. 3rd month they deducted R180 again, 4th month still R180 was deducted but this time I reversed the money. After that I would get calls 7 am for payment arrangement.. this goes on fir the whole month the month end again there will be unauthorized debit order of R180 no feedback nothing.. end of August there was even double debit orders of R180 from cartrack. Still I reversed meaning more harassment for the month from cartrack. Now there is an unauthorized debit order of R180 that went off on the 26/09/2022.. I'm really tired of this company and it's harassment. Even blocking debit orders doesn't even help.