Freezing chambers lost

So long story short, I picked up FC from Palette Town and put it in a storage box on WW. I went back to build it and it’s not there. I’ve already defeated the main story and I’ve got about 80 hours in with 164 Pokemon discovered. I think I reported the issue to Nintendo properly (I’ve seen other people have the same issue) but I’m so frustrated that I’m thinking about just restarting my save and making sure I keep track of where I put it. I’ve checked every storage space in every town and walked around every inch of the game and still can’t find it. Uuuuuuuugh