Do the stuff which has least amount of hassle for you.
It's very rude behaviour from your neighbour.
I suspect if you don't get rid of it now, they'll use lockdown to avoid collecting it. (I wonder if it's an easy Christmas present? That they're hoping you'll store for them?!).
I'd give them one last chance.
Write a note sonethinkg like...
Dear neighbour,
I received this pack from Amazon? on date, this is now x days ago.
I have tried four times to deliver this. I have also left x notes through your door. Yesterday you were clearly in and no one came to the door.
Please collect this from our house at number x, TODAY.
If this is not collected by then, I will be making efforts to return it.
The lack of collection by you is completely ubreasonabke. In light of this, please do not use us as a storage service again.
Best wishes,
TAKE a PIC of the dated letter.
If no response, ring the delivery people tomorrow and get them to collect /arrange to drop off... But only if it is on your way somewhere else...