Then, when my invoice isn’t paid, I threaten collections on them personally and the company. Usually that solves it. Then I’m “such a dick” but highly effective in recovering my time.
"Hi this is Arnie from CHewemup'n'Spitemout Staffing, is this Bob?"
"Hey Arnie, what perfect timing! I just started looking for a new opportunity, and I'm really excited to— CLICK."
Ring ring.
"This is Arnie, we seem to have been cut off."
"Oh Arnie, right, thought you hung up on me."
"No, not me, must be a bad connection. You were saying?"
"Yes, I was saying this is a great time to talk about opportunities. I just finished a major Java Enterprise JavaBeans project, and I'm— CLICK."
Lather, rinse, repeat, as the meme used to go before we called them memes.
https://jollyrogertelephone.com/
I also will give out the number to local strip clubs for sales people which seems to be confusing to them.