Cartrack bad customer service

Worse customer service ever. I have listed my complaints via email and via telephone asked to speak to a manager no phn call back. They broke there contact with me I asked to cancel it. Now I must pay my contract up when certain features were not activated that I paid for I reverse my debit orders til. Problem was attended too but they still billed me erelevant of the circumstances. It looks like the consumer has no rights. I am now in arrears for months with them my services are terminated by them yet they still billing me non stop. Any advise. Now they threatened me to list me on ITC