Open a case - you can use the link below and you don't need to contact Ebay.
However, if tracking shows delivered, the seller may win the case.
So:
Check the tracking - where does it show delivered to?
Look around your property, behind the bins etc. (Our local Evri driver always leaves parcels outide the garage door - I would assume he thinks it's our front door, except you can see a motorbike through the glass of the door!)
Check with your neighbours.
You can report an item not received using the button below:
Report item not received
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)