Cannot stop debit order and paying for years for something I don't even have anymore

I cancelled my Tracker subscription on both my vehicles in October 2021 and I have been paying unwillingly for the last 3.5yrs. I cannot stop the debit order at the bank, it gets bypassed every time and I tried cancelling cancelling cancelling and nothing. R17000 later and I am sick of it. I am retrieving my emails from the account that I used to cancel because this is ridiculous. I want EVERY CENT BACK