I always use this trick all the time when someone is yelling at me over the phone.
Stay completely silent.
This will always work, and I recommend to you guys.
Don’t ignore them and speak when spoken to but when they are talking, nothing. No “uh-huh”s, no “mmm”s, no “I see”. Nothing. Deprive them of all subconscious feedback.
You really have to work at it because humans naturally try to feed off one another verbally in conversation. The other person will quickly sense that something is wrong in the conversation and it usually throws them off track enough that they stop ranting or yelling and tell you what they actually want.
Best way to shut someone up without being rude. Semiotics professor taught it to me.
“I just want you to know I personally have no problem with you being at this party”
This sentence can literally ruin someone’s day.