Netstar is the worst tracking company in South Africa and they just dont care about customers and are bullies,Please do not use their service at all

I took out a insurance with Budget Insurance (Also the worst insurer ever),As part of my package I also included Netstar top of the range option,Firstly they took time to come and install,When they finally installed they installed a system that has no panic button even thought I specifically requested for one with a panic button,I complained then they came and installed the right one,I asked the technician how everything works he just didn't have time,Did not even tell me or show me how to track my car on their portal,Everything was just a mess,After a week I pressed the panic button as I was in a emergency, Nothing happend,then pressed it again last week nothing happened, While I have been trying to contact them to come and fix the system as the Technician installed a duplicate system(A system that was already installed in another car),Mind you to get ahold of them or to finally be directed to the right person takes about an hour or so cz they either do not have enough consultants or just plain unprofessional, They finally came to my place on Thursday they spent an hour on the car ,I asked the technician to test the system before he left,Still the system shows somebody's car and the panic button does not work,The Technician told me there was a similar incident where a customer had to go 3 months with a non functional tracking device they fixed it on the 4th month,I am going 2 months without a properly working device but at the end of the day I still pay full amount,They do not show any signs of helping me and they refuse to cancel my contract with them...I want to change to Car track as they have good reviews and a couple of people actually recommend them for their good service, My question is how do I cancel as I am paying for a service that I am not getting and I took it out with Budget Insurance and they too are not helpful at all