Do not let anyone mistreat you.

Prohibiting further interactions

The last resort - as we cannot force people to own their behavior nor change it - is isolation. Hopefully, the other people in your circle - social, family, work, community - will do the same. It is one of the great crimes in life when we neither advise others of their wrongdoing nor make them pay any consequence, then presume the behavior will go away on its own. Even if their change is unlikely, we must do what we can to alter the poor momentum in which the selfish and abusive engage. We cannot make them responsible, but we can make them accountable.