Bad service

Extremely bad service. I bought my car second hand from a dealership and the cartrack was already in the car when i purchased it. I have paid my premiums every month and no one told me about any warranty expiry dates. On the 1/08/2019 i get a message stating that the device is not working properly and i must book it in for a repair. So i phone cartrack speak to 3 different people (keep transferring me to someone else) last person i spoke to is so def i was shouting over the phone so that she could hear me. Just to be told that i must pay R600 for a repair because its out of warranty, ****** that i want to cancel this whole thing right now, the response hold on i ll transfer you to customer care. no thank you i spent 20 min on a phone call to get no where. i want my august premium back for no service and an immediate cancellation.