Call blocker might be of some help. Also don't pick up on numbers you do not recognize, or where there are caller IDs that seem odd. Or where there is no caller ID.
This number has called repeatedly asking for me by my first name. Sounds like a computer voice to me, because they say "Is Julie there?" when my machine picks up instead of leaving a normal message on a machine. Only the letter "I" shows up on my caller ID, so I know not to answer.
Received a call from this number,a short time ago,which I did not recognize,or answer. There was a message asking for my deceased husband.......not cool!