Pathetic Service

I installed a cyber sleth supreme unit on my vehicle on the 26/03/2015. I have tried to register, however, i have been unsuccessful on many occasions and i have not received any feedback from Netstar after sending e-mails and calling. The customer service is pathetic and this device is obliviously not serving its purpose.<br> <br> How do i go about cancelling this? I will not pay for something that does not work!<br>