Unfair binding contract

This is the second time reporting my tracking device that is not working and promised to be helped but no serving am receiving and am paying every month and begging for service every time. Am speechless i don't even know what to say but am waiting for my track device to be repaired as i was promised but no one is willing to do so ,since march i do lodge a call no service, this time since i lodge call last Saturday no one is willing to help. Am paying and not get serving because if you stop paying the contract bind me to pay even if am not getting service