Where i live its been sunny intervals all day its no less than 4 degrees and no snow in sight.
Also why does that mean they can pretend they attempted a delivery !
I did wonder if you might live somewhere the weather has been alright. I suppose it is possible the item bounced thru a regional depot affected by the weather.
However, I didn't read your OP completely to see they'd claimed delivery. In light of that then it's just down to their legendary shitness then.