This is reported as a sequence: the login email on the account is changed while an older wallet and a code-hosting login are still attached to it, a top-up goes through, and then the account is limited. Whether the email change is why it was limited is only OpenRouter's to say — account limits are their decision and the criteria are not published, so treat the sequence as what you can describe, not as a cause you can prove.
What is clear is that nothing on the payment side of this changes an account limit. Paying again is not a route back in, and a second payment made while the account is limited risks landing behind the same restriction.
The useful thing to hand support is the identity trail: the old login email, the new one, the date you changed it, every other identity still linked to the account, and the date and amount of the top-up. Put it in one ticket and reply to that ticket rather than opening more. ROZO cannot review or lift an account limit — that is entirely OpenRouter's. ROZO is independent and not affiliated with OpenRouter or Coinbase.