This is my opinion, and may not be 100% correct, I'll try to be brief, already wasted hours with them on the phone and I'd rather not waste anyone else's on their account.
My Alarm Center purchases contracts from alarm companies, and so you may have been sold to them without even realizing it. Also, try to go with another company- opps, they sell it to My Alarm Center also- my advice, don't do an alarm contract- there are companies that don't require contracts and provide great service.
Our contract was cleverly disguised as a credit card authorization, reading the small print on the back reveals its a contract. 0.o ouch
They will say nice things, but heed this advice: do not believe anything they say- in fact, don't bother talking with them at all; get it in writing. The moment I refused to hear them and demanded things in writing- they stopped calling me.
Once they stop calling you, expect threats of lawsuits if you don't keep paying them for not providing any service. (contract never states they have to provide you Alarm Service, its just you agreeing to pay them for nothing).
Also, do not believe them if they say "so sorry about that, our mistake, we'll get it taken care of"; you will instead keep receiving bills for a service you cancelled, and they will no honor any verbal agreements, you have to hold another reps hand and walk them through the situation- they agree its taken care of but will refuse to put it in writing and just leave you talking with another rep in a couple of months.
Overall, a terrible experience and I really hope this alert prevents others from falling for it as well.