Cartrack Harassment for non service

I had a contract with cartrack until my car was a write off last year in February 2021 I informed car track that my was a write off. Cartrack informed me that I have to pay them even if I don't have a car as this is part of their contract.

I then asked for a recording to check if I was informed about this. A recording was then delayed and delayed for months. Later, they decided to that their lawyers should call me. I also informed them that I'm waiting for a recording. The recording was finally sent. When I listened to it, it states that if I decide to cancel the will be a cancellation fee of R1 700. by this time Cartrack states that I owe them R3 800 my question is how come as I'm not using their services.

Cartrack is harassing me everyday for a service that I'm not using. I would not recommend them to anyone.