cartrack instaled an old camera (not working) from first day

i have dual camera for my truck with cartrack and my camera was installed on the 4 february 2025 and when i test the camera was not working. i phoned car track the following 5 feb 2025 and they said they will sent a repair technician. i phoned serveral times and they always said they will sent a repair tech. now is may and cartrack want to charge me for a service that was not rendered to me from day 1 because the camera was not workingf from, first day. this is unfair to me