I get continuous authentication failures on my AWS account via root email. The password was in my password manager and I remembered it, 100% sure it was correct. I have 2 TOTP generators, they both show the same values.

AWS offers TOTP re-sync, but that fails with authentication failure.

I made a password reset, that was shown as successful in the Web UI and by Email confirmation. So my account is connected to my email and delivery is instantaneous. The new password does not work either.

They have an alternative authentication, but it does nothing. According to their support bot it should send an email, but it doesn't.

With so many failed attempts I get CAPTCHAs. Those are horrible, at least 40% I cannot read with 100% confidence. The characters are distorted too much.

My email has MFA, too. No signs of suspicious logins.

Their status page shows ongoing outages in Middle East, but I have not relationship to Middle East. I created a support case, but that is a private account without any paid support, so my hopes are not that high.

Any good ideas or previous experience?