The same thing happened to me this morning 1/20/2019. My name and home landline phone. I picked up listened and was going to hang up; they disconnected first. You, Microsoft, need to put out a statement and investigate. No isolated incident and I am sure has been successful or they would have stopped by now. React! We are your customers.
You aren't addressing anyone in an official capacity at Microsoft here. This is a peer-to-peer help community. In any event, what does "...put out a statement..." mean? A statement where? What does "investigate" mean? These are off-shore operations, and if one is shut down, two more will pop up. There's little or nothing that Microsoft can do about it. They thrive because there are plenty of credulous people to prey on.