Adding accounts to the launcher is not having a Jagex Account. Its just adding them to the launcher for quick game access.
You'll need to do the transfer account process and set up an entire new login email + password, verify it, and all that. Then when completed, use the import button on the character page to add your alts to the account. Then you'll have the Jagex Account with 1 secure login for all characters.
THEN sign out of the launcher entirely of all accounts, and log in with the new Jagex Account details + authenticate with email or authenticator.
If the email isn't working, I suggest try using a different provider if possible. If you have a different email address, or use GMail if that isnt the provider you're using atm.
Can I turn in a paper without citing all sources?
"No."[1]
1. William Shakespeare,
Hamlet
, Act III, Scene 1, line 96.
30-May-2023 19:45:58