Emotional/mental Health Issue. My Bipolar Adult Daughter Just Left Her

emotional/mental health issue. my bipolar adult daughter just left her husband, stopped taking her meds and moved in with a stranger she met online. she won't speak to any of her family and has told this guy we are mean to her and tell lies about her because we are frantic to make sure she's under good care. he won't listen to us that she NEEDS CARE!