Hi there, @Retenor96.
Are you seeing the message about your account being invalid? If so, and you don't have access to the email on the account, the only way to potentially get access restored is to go through the account recovery process. It sounds like that's what you've done since you said you haven't been able to recall the answers to the questions about the account. Unfortunately, without answering those questions, we won't be able to verify ownership and restore access. The other option is to start over on a new account and PSN ID.