Lack of service delivery

Been trying to upgrade my policy for the past three months with no success. Now my account was over charged by Netstar, for what? I also don't know. I am paying for things that I do not even have. I was promised that a technician will come through to give a me a tag as well as a panic button, till to-date I haven't received any of that neither has anyone from netstar bothered to contact and explain what the issue is. Can I just have my money bac****