Using ADT Alarm system without service
I hope some guys here may help some as I'm not sure how to proceed
I moved to a new house that had ADT alarm system, on our 1st day a saleman from safestreets (ADT authorized dealer) came in and wanted us to activate the system, to make it short, we did accept and people came in and activated it, my wife was here but not me, I'm not sure what they did. now we have the voice alarm everytime door/windows is opened.
We decided to cancel after 2 days, we got our money back. but safestreets said they will come and take the equipment, I called them to inquire what they will collect because I was worried they will take all equipment that house has (keypad, sensors etc..) they said no but just a cellular module that they installed when they activated the system. my wife thinks they just played with settings and put in some codes but did not install anything inside the main unit but she's not sure.
my question is what is the cellular module they are talking about? is it 3gvlp-adt that I can see inside or just the sim card?
Do you think that 3gvlp-adt was installed by them or it was there and they are trying to take it still?
my last question, is how can i keep the alarm like it is set up now (voice etc..) without monitoring? I read stuff about codes etc but not sure how to do it
Thank you all for your help