My old switch is broken, Tom Nook can't find my backup save data, and Nintendo customer support said they can't help. What should I do? :(

[biscuitsinbed]

My old switch is broken (beyond repair according to all the repair shops I took it to) and I got a new switch and held the "-" button to restore island data but Tom Nook keeps saying he can't find anything, even though I'm 100% sure I did backup my island. I've tried contacting Nintendo customer support (the European one since I'm from the UK) and they said my island can't be transferred but didn't go into details as to why. Did I give them the wrong information maybe? Or are they just unwilling to help?

I'm honestly so incredibly pissed off at Nintendo right now. I'll never understand how they thought it was good idea to make transferring your island so needlessly complicated when they could have just used the online save data cloud like any other game.

I'm starting to run out of options to save my island and if I do end up losing it, I'll be heartbroken and devastated I've been working on it for 5 years, I love my island and all of my villagers, and have absolutely no desire to start all over again with a new island.

I'm in desperate need of some good advice. Please don't give me tips on fixing my old switch though because believe me I have tried everything. I'm so stressed out right now, this is an AC player's worst nightmare