Who called from 2014145400

I keep getting calls from someone who purports to be from ADT about my alarm system.  Except they are not even calling for me but someone else.  I don't have an alarm system.  I have repeatedly asked them to stop calling and take me off their list but they do not.

When I don't answer they leave this number to call back:  1-877-740-4810

Yes that same number just called and did the same thing. She goes well john put you down. I was like goodbye.

I received a call from 201-414-5400, a Miss Thompson that said I must return the call in reference to my ADT account. The return number was 1866-921-3505. I called the ADT support line to find out that no one attempted to contact me and that my account was fine. I gave them the above info as well, do know what can be done about these imposters