We have been getting these calls for the last week. Caller ID shows VIVINT (801) 765-5976. Caller was extremely rude and unprofessional. Asked him to take our number off of his list and he hung up. After reading the posts here on the site - found the website for VIVINT. formerly known as APX Alarm...
http://www.vivint.com/
Called their support number and gave Jen an earful about their marketing tactics (poor Jen). She seemed legitimately concerned and offered to help. Gave her my number and asked her to see about getting us taken off of their list.
Got a call from 801-765-5976 @ 8:00 PM. Caller was a young male who said that they were from Apex alarm and asked about my home security system. I asked them to give me a call back number. It did match the apex website contact number. Still don't trust the caller.