It is possible to change your email that your account is verified with, but you will have to have proof that you are the owner of the account (which might be difficult, but it includes having the same IP, Gamecenter, etc).
It will be even more difficult since you are not able to log on your accounts on Era/Classic to prove ownership and change the emails. As far as I'm aware, only the Managers & Global Moderators can change identified emails.
If you message me in-game on Era, I might be able to speed up the process of retrieving your Era player account. Best of luck

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