Poor Service from Customer Care Department

Maybe i'm just unlucky when it comes to Cartrack Customer Service department, i have x3 vehicles with cartrack which I'm considering cancelling and find a different service provider because everytime you call they can't answer simply questions and say they going to find out from supervisors and that is the last you hear from the agents. They keep you waiting for over 10mins and never come back to till you the Customer end the call. Very disappointing. If a more senior person can call me to assist me that will be highly appreciated because my next call will be to cancel my contract with Cartrack.