Had a problem with a rotary airlock on a piece of equipment.
Looked up their phone number, called the rep up – “I’ve got a problem with this piece of junk. What you shipped us is not what we bought! I’m sick of this crap coming from your company!”
On the other end – “Well, which piece of equipment are you talking about?”
“The rotary airlock!”
On the other end – “We don’t sell rotary airlocks!”
Checked my number – realized I’d called the wrong guy. – “Do you know who I am??“
He said “No-“
I said “Good!” and I hung up.
Real conversation, sometime in the 80’s.