Just to confirm, have you tried following these steps to regain access to the account: https://goo.gl/np8FWK . Keep us posted.
@TeamYouTube Hey! My channel got hacked last week and the channel was removed without notice. I submitted an appeal but it was rejected. I was in the Partner program, but I cannot contact support since my account is gone. Any help would be great! All my music was on there 
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I just saw your reply! I have access to the Google account still (luckily, because it's a G Suite account), and I was able to change the passwords and everything, but the Youtube account was still deleted separately.
End of conversation
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