I had a vaguely similar situation where the maintainance company would ring my doorbell whenever they forgot their keys, had questions about the super, or just wanted to know something like the zip code. I m up a couple of flights so I think this was just one more way to harass me.
I'd simply tell them over the intercom that they had the wrong apartment or I didn't know what they were talking about. Once they began to realize I wasn't there for their convenience, they stopped ringing my bell.
You could always put a note on your bell "For Apartment 1 deliveries only" or something to that effect.
<small>[ October 28, 2002, 07:31 PM: Message edited by: Cranky Tenant ]</small>