CALIFORNIA BUILT IN SYSTEMS

I received an email advertising a 'free' system upgrade. I called and spoke to Alahandra (please excuse the spelling) and made an appointment for the 24th, between 9 and 12AM. The morning of the 24th, the phone rang, but I did not get to it in time. I called the office to make sure, if it was them calling, that I wouldn't miss my appointment. Alahandra told me she would check and get back to me. When she called back, she asked me if I was calling about the 'free' upgrade. I said yes and then was told that I wasn't on the schedule. She said she could put me on the schedule for the following week. When I asked what day, she requested I tell her when I was available. I said Monday. She said that they are closed on Mondays. I said Tuesday. She said okay and that it would be $40/month. I now pay $300 a year for monitoring. I told her to never mind about the 'free' upgrade. I re-read the initial email and did not find it to say that my monthly monitoring charges would increase. How is this a free upgrade? I'm thinking of canceling everything with California Built In.