Unfair Treatment and poor support

I trusted car track and i have been with them for about 3 years, but recently they have changed and don't care about their clients, what the care is the premiums.

i had i problem with my dash cam last year. called them to assist and they sent technician who advised that my car battery is faulty, i took the battery center and confirmed my battery is still fine. i called them again hoping that they can assist but till today when i call they transfer me from one department to another. now my account is in arrears of +R2000 and they force me to pay for the service that i never received. if i try to cancel with them they bill me more money as i signed contract with them. BUT, is it fair for me to pay for the service iam not receiving just because they control their system?

i just want them to sort the issue with my dash cam and my account arrears.