How is it known if the failure is theirs?
All that’s known is that the OP claims the package was not received.
But YES - Amazon needs to change their policies such that some form of delivery confirmation can be required.
No confirmation of delivery - reship
Confirmation of delivery - shit outta luck on replacement.
If this really so difficult?
And to Grude - I would have told the guy to go pound sand, if I have confirmation of delivery the buyer can follow up with the delivery company.