I only found out this morning when i contacted Cartrack control room 2024/04/06 that the unit in my vehicle is not working,its not even given any signal and Cartrack control room cannot locate my car

I only found out this morning when i contacted Cartrack control room 2024/04/06 that the unit in my vehicle is not working,its not even given any signal and Cartrack control room cannot locate my car. After being redirected to service dest to log a service request ,i was told there are charges involved (R600.00) to fix a faulty unit even though my warranty is still valid and premiums up to date. I find it very unprofessional of Cartrack to fail to detect or pick up via their system when the unit is not giving any signal before i test within their three months period.It means if i got hi-jacked,it was impossible to recover my vehicle but Cartrack promised on their contract to safeguard my car 24/7.