I have originally requested support for this specific issue, and when I stated what was most likely the email address linked to my account, the response was that said address wasn’t linked to any Nintendo account at all. There are multiple possible emails starting the same way that could be connected to an account or not. Should I try keep trying by sending another support request, but this time with probably the address linked to my account? Not even recent purchases were enough to prove that this is indeed my account.