Hello - what is your Behance URL? We can let you know what email addres you'll need to be logging in with in order to access this account.
I'm having the problem trying to login to my old Behance account. I recalled that I didn't change my email address yet I'm unable to login with the existing email address that was used with Behance account. I tried to use Adobe ID forgot password but got nothing. I also can't visit Behance Help which is down right now.