When you deleted your account, you were shown a confirmation screen which told you that your email address will be unavailable for another month afterwards, so it cannot be used to create a new plex account instantly.
There is nothing gained from deleting a plex.tv account and then re-creating a new plex account. Nothing will change, nothing will improve.
I can file your old account for restauration, if you wish.
Otherwise you will have to use a different email address, or wait until the month has passed, before you can use this email address with a plex account.