Poor Service and Unfair Billing. (I will not pay!)

Poor Service, I ordered a 4g phone sim card last year and the sim does not work and I am getting billed monthly. The support is now telling me that they are not billing for usage but service. I will not pay for service which was never rendered. It is on their system that the sim has never been used and the reason of non usage is because the sim does not work in all my devices. You render a service I pay, you fail to render the service I don't pay you that is the basic business deal. :-)