Been charged for a account Cancelled last Year Sep

I am tired of the drama at Altech netstar with this account. I have a tracker with Altech. I cancelled the account last year sep/oct when I sold my vehicle. I asked to deactivate the tracker in the old vehicle and reinstall in my new vehicle. This never happened, as I was told they cannot move the tracker. Now I'm sitting with my new vehicle an no tracker. I then cancelled the account. Since Oct I have not received a invoice, yet I pay every month!! I want this tracker cancelled and I will pay the unit off. You Have not provided me with a tracker service since last year when I requested you deactivate it. I doubt it was deactivated as Altech Netstar does not do what the customer requests. I want this resolved ASAP. Im paying for a service not rendered by your company. you cannot track a car I dont own. I CANCELLED YET I AM FORCED TO PAY FOR A SERVICE I CANNOT USE. Please refund me the amounts I have paid for your tracking service since last year Sept, as you cannot provide me with a service if you cannot track a deactivated tracking unit. GET BACK TO ME WITH A RESOLUTION IF NOT I WILL HAND THIS OVER TO THE CONSUMER BOARD TO RESOLVE. YOU CANNOT CHARGE FOR A SERVICE NOT RENDERED