Iirc you only need the verification code to create a SEGA ID, but you seem to need it for something else, since you imply having already played the game. Logging in doesn't require your address either. Why do you need the code?
ETA okay you need to make sure you are entering all your account details correctly, even the captcha. If you still cannot log in / find your email I suggest you cut your losses and remake your character, if you still want to play.
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