Hello,
Please refer to the policy on account trading, found here: https://forum-narutoen.oasgames.com/page/show-post-52322-1.html

Unfortunately, if you have willingly given access to your account away (we cannot stress enough that we recommend against this), we may not be able to help you in situations such as this. However, You can attempt to 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.

https://profile.oasgames.com/web/reset-password/get-user-name?lang=en-us

https://support-center.oasgames.com/