Yesterday, the damn Arab dude who's called my place numerous times and kept going "hello? hello? hello?" until I just lost it each time and told him he freaking had the wrong number called again.

It wasn't a good idea, and I let out the steam:

"Listen, you've called here a hundred times already, so I think it's about time you crossed this number from your address book and, like, never call here again."

Yes, I felt much better afterwards, thanks.
I sure hope I scared the hell out of him.