So I'm expecting a package to be delivered, right.

And the delivery man, when dropping said delivery off in the hallway says;
"Don't mind if I use ya toilet, dooyaah"

Is it ever acceptable to say no in this situation?
I felt used and uncomfortable.
He even left the door open whilst pissing, and was whistling whilst I stood at the bottom of the stairs listening, waiting for him to leave my house.

Like, it's alright for electricians/plumbers/gas people. I get that.
BUT DELIVERY MEN?!