This is a manipulative person, and you have not found your defense so far. You are defenseless (except some of the managers seem a little protective).

Avoid any communication with this person if possible. Be careful never to be dependent on them in any way.

Take good care for yourself at all times. When talking to others about this person, ask only for advice about what would be best for yourself, nothing else, no talking anymore about what they have said or done etc.