Poor service on my account

They installed tracker in my vehicle in 2015. They have been deducting money all along . last month i received a phone call that i owe them, i asked the lady why have they not been deducting money from my account and she said it was a technical problem on their side. I asked her if my tracker was still active and she told me that she will call me back. She never called back until i received an email yesterday with final demand from Shapiro Shaik Defries. I called the company that i receied an email from and they told me that they do not have answers for me that i should call telematics. When i called them this monrning, i spoke to a lady called Shirley and she told me that my account has been handed over she doesn't have answers for me. I then told her that i was not going to pay until they answer all my questions. I then insisted that she transfer me to her supervisor. Then i spoke to Faith who is the supervisor. She said that the reason why they were not deducting was because they did not find money in my account, then she said it was because my account was suspended or something. Then i asked if my account was active and she says no, it has not been avtive since last year August, then i asked why was i not told, she said they told me last year, which is a lie. I dont understand why i have to suffer for their incompetence .