No after market service from cartrack

I've had it with the zero customer service from cartrack. The are quick to take your money but non existent when there's a problem with my tracker. I had 2 vehicles at tracker for more than a year. Then a bought 2 more vehicles and decided to fit them with tracker also. Since day one the one vehicle's tracking is faulty. Around two hours after i drove it i get a call and sms of a power failure but the vehicle is fine. Not nice to get home after 11 at night go to sleep and 1 o'clock in the morning the phone rings cause of a power failure. After many call i got hold of someone to send a technician. Technician came but couldn't do the work as they gave him the wrong jobcard( one of my othe vehicles) he left and since then NOTHING from cartrack no call no sms no email. That was a week ago. Yesterday morning i again send an email. No response up to now. Spoke to my attorney and was advised that this is enough grounds to cancel my membership and go to another tracking company. No aftermarke service