Vivint Smart Home Vivint Sold me a bad alarm with continuous problems San Antonio Texas

I had a new security system installed in my home. Over $3,000 of equipment. This was done in February 2017. I have had nothing but issues with it since. I have had technicians out 11 if not more times and another that cant come out for another 2 weeks. I call in and they waste much of my time troubleshooting before they decide to schedule an appointment . I do not have the time for this. the doorbell camera still does not work. Our home has been vandalized on a regular basis they have come to my door and even egged the front door . And the doorbell camera does not record. They have terrible customer service and cannot keep this fixed it may work a few days and then it stops for weeks on end until I have time to call it in again. I have called and called. They are supposed to be protecting my home and I am paying them to do that... all I want is my contract cancelled so I can find a company that works. They already took a year-and-a-half of my money for a system that does not work. I don't want back what I put into it they can have that I just want them to tear the contract and let me move on to a company that can protect my home.