Bad service

I wanted to upgrade the tracking devices on 3 vehicles. I was in a hijacking and I took the package with panic buttons for peace of mind. The new device was installed with the panic buttons. I was informed that you press down on the panic button until the red light turns green and then after 3 mins an agent will call you. The button is so hard and tiny to press that you have to use your nail press into it for 20 seconds then my turns red and dies off. It doesn’t turn green. On calling Netstar, the devices were never linked!!! Now I want to cancel the panic buttons only because of how impractical and is not functioning as promised and they are refusing, stating I must pay a cancellation fee.