801-682-1597 is ISI Alarms.  They do not respect the Do Not Call list.  Call them directly at below to get off their calling list and them I suggest you report them to North Carolina Attorney General office by downloading the complaint form.
Good Luck

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ISI Alarms North Carolina
Find a LocationPhone: (800) 650-2712
Fax: (704) 456-7547
View Additional Phone Numbers
919 N Main Street, Mooresville, NC 28115
http://www.isialarms.net