Pferreir, hellbanning is where your posts appear normally when rendered for your account, but do not show up for anyone else. Try viewing this thread using a freshly created HN account.
Don't know why this has happened to you...
You'll probably need to start a new account, unfortunately – there doesn't appear to be any protocol for being 'unhellbanned'.
I'm just the messenger – by no means am I in any way associated with HN.