I keep getting calls from this number, no one there. Thinking about disconnecting phone I've had for 30 years.

This person keeps calling my 80 yr old parents and threaten to sue them will NOT tell them what company it is.....and my dad wants this reported to the LAW....if this doesn't work...so STOP IMMEDIATELY!!!....or go to jail....

This is a discussion forum where one can report or describe suspicious or unknown phone calls, but reporting them here does not stop the calling.  YOU have to take action to do that!  (google is your friend).  Consider buying a call blocker from your favorite store if nothing else works.
http://gg.gg/blockers