[mothered]

Driver left my parcel outside my door.

Perfect to DNA It.

and he uploaded a photo.

The photo Is useless - It doesn't change the fact that the package was left unattended at your doorstep.

Would dna work still?

Absolutely - for the reasons above.

I live in a flat and parcel left in the hallway which is accessed by everyone on that floor

Brilliant.

Someone stole your package.

so what do I say on live chat?

Don't go Into detail.

Simply say you're still waiting for the package to arrive.