Ctrack SA will not terminate the service.

Since being unemployed from August 2021 I have been emailing Ctrack to terminate my contract which I signed up for in November 2017. I have left South Africa so I don't have a phone where they can call me, it seems my emails are being ignored as they keep sending me arrears notices instead of terminating the service as I've requested. I've paid up the device as I've been paying over 3 years now. This is poor service because I'm not using the product, I've paid for whatever device they installed and to top that off I still get notices for a different car that I had signed up in 2016 which was written off in 2020 or 2019, the car isn't even in South Africa anymore and I'm still getting notices about it, after calling and canceling that car. So I feel like I would have still been tracked AFTER termination my privacy being invaded. I need this termination backdated because I have requested termination amd I explained that I'm no longer employed. I'm not even in South Africa.