Cancellation fee after the company failed to recover the car. **** procedure

Our Car was ******, the ******* managed to remove the tracker, and Cartrack failed to recover the car, Since then they never stoped deducting the money for the car tracker, they didn't replace the car, and now when we ask why are they still deducting the money the say if I want to cancel I should pay the CANCELLATION FEE.

What nonsense is this???? I wish I had removed all other 4 cars from their Company after they failed to recover 1.