Of course. But I wonder if there’s something else going on for him? If he was hiding behind his door when you went knocking maybe he has some kind of anxiety about answering the door? Is that perhaps why he’s become so reliant on having parcels delivered to you? How does it usually go, does he come and collect from you on his own schedule or do you take it up to him? If he comes down maybe he’s coming when he feels up to it?
Obvs it’s not okay to use you as his mail room attendant in this churlish way. He should be collecting his stuff in a timely manner at the very least, and also reciprocating in some way with… flowers? Thank you notes? A gift voucher?
But since it’s come to the point of being this legitimately pissed off at him, maybe it’s become necessary to put some kind of regulation in place. Could you stick a note through his door saying you’ve reached your limit for reasons and you want to put in place some kind of agreement about how this happens in future? Or just tell him you don’t want to do it at all so he’s going to have to find a different solution, being clear about refusing to receive the parcel or something else that’s reasonable for you. To state the obvious, once you’ve set out parameters and boundaries, if he fucks up he can’t complain, it’s on him not you.
Sorry for the solutionising, I know that’s frowned on on here, but it seems possible he may possibly have something going on that’s not just him being a dick…?