Making a new account with an old email

I have a student Adobe account. Since I've graduated, I want to migrate my assets to a personal account. I actually had one from a while ago but never used it. I was unable to move my work to that account, since Adobe is forcing me to make a new one, so I deleted it in hopes of freeing up my personal email. My old personal account has now been deleted (Adobe says it's deactivated when I try to log back in) but when I try to make the new account, it always say the email is already in use? Do I just need to wait longer or can I really not use my personal email anymore?