Same here, if a customer says not this time & its not a valid reason, they are dumped.
I had only one last year, about 3 months ago, husband came out & said not this time, a lazy fat git that does nothing, i explained i dont offer that service but he decided to have selective hearing, DUMPED. He always got on my nerves, the last thing he said "see you next time".
Anyway, he came out moaning this week while i was doing either side that i have missed his out. "Thats right" i said, "you cancelled". "No i never" he said, "Oh yes you did when you came out & said not this time". STILL DUMPED.

Macc