Subject to the BC, and depending on where your flat is located from the entry door an inexpensive wireless doorbell clearly marked with your flat number and name might work to solve the stalemate although the driver might not be happy to wait for you to get to the door, so an alternative might be a personal video doorbell, the subject of another topic that includes links to Choice reviews.
Whether either would work in any case depends on the distance and building structure between the door and your flat.
Another option if the BC would allow it is to install a suitably large and secured parcel locker outside the entry door.
