Anyone willing to give me a reply, why my account is suddenly inactive, then banned, then locked?

Dear all, I have been playing quite actively and then I stoped for some time. Now, after some weeks / months I tried to log in and the login screen for the launcher tells me: 1. Account is no longer active. Ok, I come here to the Forum and check how to re-activate an older account. It says, restart ...

Still cant log in