I have been the victim of a phishing attack

He cambiado mi correo a uno mas seguro, las claves, el autentificador son seguros ahora.

mi pregunta es: El Hacker puede robar mi cuenta de warmane solo con un correo electrónico mío anterior registrado en esta cuenta

Soy una persona que colabora con Warmane y que utiliza mucho la tienda de donaciones; soy muy activo y me gustaría seguir disfrutando del juego con total seguridad.
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I've switched to a more secure email address, and now my passwords and two-factor authentication are protected.

My question is: Could a hacker steal my Warmane account simply by using an old email address of mine that was registered to this account

I'm a Warmane contributor who makes frequent use of the donation shop; I'm very active and would like to continue enjoying the game with complete peace of mind.

If you've already changed your password and email address, and even enabled two-step verification, I don't think there will be any problems, to be honest, although a moderator should answer this.

They would need to provide evidence of account ownership, e.g. donation receipts, activity descriptions, usual login location etc. That's not likely that they would've gotten all that from phishing, unless you re-used account credentials everywhere.

Even then there would be some red flags Warmane's staff would check. Logging in from one location for the past 5 years, then all of a sudden an account being logged from another location once or twice before password reset and email change happening from the first location would raise some red flags, if somebody tried to recover the account from the second location.