Excessive "Cancellation fees" and diffucult to cancel contract

I Purchased a vehicle in March 2020 and fitted a Tracker system due to the benefit I get from my insurer. I sold the vehicle in Feb 2021 and purchased a company vehicle which was ALSO fitted with a Tracker system on the company name. I sent 3 emails to tracker to cancel the contract on the 1st vehicle. I did not receive any response. I called Tracker a few months later as I was now paying on the new vehicle and the old vehicle. The lady informed me that the cancellation can be done. I would be invoiced a cancellation fee of R1200 (Close to 6 months of premiums) AND another months worth of premiums would be debited along with the ludicrous cancellation fee. Clearly not the first unhappy client she dealt with in regards to this "fee" Hopefully my last experience with Tracker.