The other day I tried to create a Github account and was repeatedly told I am fraudulent. Nothing else. Try again later, it says.
This is the same thing that's happened every time I've tried to have a Microsoft account. I don't think Microsoft wants to have customers who aren't rich.
Same here with github.
Maybe some bot signed up using your email and then did bot things on it. I've had that happen a lot over the years. My Microsoft account is still stuck in German because that's the language the bot used when creating the account (to spam X-Box apparently).