2nd Car Track Complain

i have been with a faulty device on my car for over two weeks, called customer helpline still no assistance ,will it fine if I reverse this months premium as I will not be paying for service not rendered and putting my car at risk of being ******? Dealing with your noisy Customer Care room is unpleasant , they always promise to call me back as they do not have answers,this is my second review regarding this matter and still no solution .