Complaint Review: Vision Security

I have concerns about the deceptive & disengenous way Security Networks did a "takeover" of my home security service. I had a service with Monitronics and a year ago a young man came to the door and said he would like to "upgrade" our existing service. I assumed he was with Monitronics but I would later realize he was doing a "takeover" for another company named Vision Security. The signs and phone numbers I was given to identify my security system was with Security Networks. 

 While Vision has an address in Utah I have have noted that Security Networks has an address in Florida.   

I have also noted that both these companies have numerous consumer complaints against them and was wondering what exactly is the business relationship between the two?