Area Code 406

Don tut know

when I call back they only answer they are busy messaging no way to leave message it just disconnects

When I answered the phone the caller identified who they were.Then she asked me if I was Lisa,then I said may I take a message.then she said no because it's important that she speaks to me directly.

Was texted from this number, so has been hard to find info, but I assume it is likely a young male such as a teenager or else someone in their earlier twenties, based on the speech pattern, though it is possibly a female pretending to be male.

This person at this number has hacked a couple social media accounts related to me and has been very profane about saying they have intend to rob as much information from me and my contacts as possible.
It appears this number is either a mobile or else VOIP number.
They will send a mysterious text and if answered uses very broken English revealing they are foreign. By their mispronunciation, I will assume they are either from India or perhaps the Middle East.
I am hoping this puerile person is stopped before they do someone some serious harm by locating very vital information