How frustrating! This seems quite common, just bad communication.
We last had a new kitchen when dinosaurs roamed the earth, and we were talked into hiding the washer and dishwasher etc behind a run of doors in a frame. It did look nice and neat because our kitchen is not big. It is fine until something goes wrong, then DH has to practically dismantle the frame to pull the machine out. Chaos, tools and cabinet fronts everywhere. Not our best idea!
Actually undoing and redoing the pipes is no big deal so you'd think the white goods dealers could find a few more skilled people.
@BCBird I remember! Yes dishwashers too, just to get you hooked on Finish.
TBF it would be a waste giving me washing powder as I hate them all, but admittedly I am not their target market. I am permanently shocked reading on MN about how people love to douse their laundry in fake smells. I can't walk down the detergent aisle in Sainsbury's without getting a raw throat.
(Rant over!)