Hello - sorry to hear that! Sorry for the late reply - if this happens, you can just open Behance in a different browser and try it again (this time with the right birthday).
Let me know if you were able to get in, thanks!
I'm having the same issue. And have been waiting a long time for someone at behance to contact me. Please help me. my behance account is behance.net/kemio
Hello- taking a look into our support channels, it seems that you submitted a ticket today and got a response from us - let us know if you're still having trouble!