Oh yes, that's how a terribly mature individual acts and responds to a discourse not of their liking. Attitude especially shines thru on that next-to-last note set.

I agree with what was said earlier; you were professional but should have stopped responding to him earlier and blocked him outright. Kudos to you for keeping your head, though. And in the future, don't justify your prices. You're the artist, you make the call.