Hi there. I'm very sorry to here about these problems when trying to log in.
Firstly, double check on the dashboard that the email used is exactly the same as the email you wish to use. You can check here:
https://dashboard.pokemonrevolution.net/auth/login?redirect=%2F
If the email is correct and has no typos/mistakes, have you checked your Junk/Spam inboxes of your registered emails? Sometimes, Verification emails may appear here instead of your main inbox.
If there is no mistakes and the email is not in any other Inbox, please make a forum post using the link below. Be sure to mention your Username and the new email you wish to use.
https://pokemonrevolution.net/forum/forum/221-2fa-email-recover-assistance/
I hope this has helped and you're able to start your adventure in PRO
Houndstone