Nintendo linked to another Epic Games account?

I would like to link my Epic Games account to my Nintendo Account, this does not work because I'm told it is already linked to another Epic Games account then I have broken the link but whenever I want to link it to my Epic Games account, I always do I said it is already linked to another Epic Games account, another account is automatically linked on Nintendo, I can always unlink it, but if I then want to link it to another Epic Games account, it will automatically be linked to another Epic Games account linked and it fails because of it.

Call Nintendo Support and describe your problem, they will surely be able to help you. The waiting time is also very short. I got it right after 10 seconds. Is also very polite.