One thing you need to know is that if someone gives details of his account to someone else on his own will- then Oasis prolly won't do a thing to help him. It's his own fault like you said.

https://forum-narutoen.oasgames.com/page/show-post-32694-1.html

Beside that- it should be reported to Customer Service. https://support-center.oasgames.com/?lang=en-us

I see. Thank you for answering.:)

smh when will people learn NOT to give there passwords to anyone online on any game.

I thought this was 2k18

Hi! I understand your friend is looking to delete his account and he can definitely contact general Customer Support, which Tiami provided. However, your friend c*so try to get his account back, which he can through this link: Click Here

Your friend will be asked questions by the support team to authenticate his identity as the Owner of the account. However, it might be a better solution than deleting the account.

~Jib

Additional note: I know you guys are aware that sharing account does break the Terms of Service so getting the account back is not guaranteed, but it's worth a try.