This is what I received on my case from an Amazon employee at MAN1 who was blaming everything on UPS:
"We’re accepting this PO every time it shows up on our schedule, it is just
not being delivered. Can confirm this through seeing the PO on two separate ISA’s scheduled that;
One of them, the PO was not delivered and was later virtually deleted off as
it had never been received at MAN1, the second appointment was a no show and never arrived to site.
MAN1 currently has a very low backlog and can accept this at any point - it
is not a MAN1 rejection issue. "
So they’ve either got a “very low backlog” or they are working “double” because the place is so stacked out?