Collect it when you are ready and not before. No reason why you should be out of pocket just because it got here sooner than expected, an if you’re up for it tell the dealer that you’ll cancel and re-order to get it at the lower AP, they might change their mind. My dealer did it all be it a little reluctantly but there is nothing lost for them so it worth insisting.
and that’s the reason why most of Škoda dealers (and other) taking no return deposit. People what to cancel and re order because of AP dropped but if it would go up would you do the same ? Don’t think so. It’s hard to find a dealer which will cancel and reorder for the less AP.