it was a robo-call that wouldn't stop and I was pi$$ed (not the British pi$$ed).
But I got 'em.
I found my old telephone interface from analog days.
Pressed a button to "speak with a representative" and let them have a 3khz tone at full blast. Prolly not as painful as when phone were analog only, but I heard a string of potty mouth and the headset hit something before the disconnect.
Bet I'm on the no call list now.
!#$@@$#!
composed with both pinkie toes