Hello,
You can recover your account through the account recovery tool or by creating a CS ticket in game or in your user center. Here are the links to the two platforms you may use. Please keep in mind that recovering your account by creating a ticket will require more stringent information checks. Unfortunately, we cannot assist with appeals or account recovery through the forums. Only the below two links allow you to do this.
https://profile.oasgames.com/web/reset-password/get-user-name?lang=en-us
https://support-center.oasgames.com/