Sounds easy.

IF WE COULD LOGIN AS THE PRIMARY ADMIN EMAIL.

Bought the CPA practice from him August 2021, and his email is no longer active, nor is there a password.

So thanks for an answer to someone else's question.

Have sent in the requested documentation, provided additional documentation, and then "Poof", it all seems to vanish.

How about a contact person who actually has the authority to fix the problem?