Zavvi shipping issue? “not possible to identify the delivery address”

From Zavvi shipping partner (Royal mail):

“Sorry, our delivery partner was unable to deliver this item at 08-02-2025 as it was not possible to identify the delivery address.

Attempts will be made to identify the correct delivery address. If this is not possible, the item will be returned to the sender.

There may be more information on our delivery partner's website.”

My address is on a military post but I’ve never had issues getting mail before. I also put in mail forwarding recently as I recently moved.

Anyone ever deal with it? I’m concerned because this is a now sold-out movie.