How do you convince someone with anxiety and depression to accept your help?

How do I get through to my daughter?
She suffers from anxiety, depression and PTSD related to an assualt in 2016.

Friday, she left me a note saying it was time she got her life together on her own.

She is now in Santa Rosa California with no place to stay (where she was going to stay fell through), no job and her bank has locked her debt card up for suspected fraud.

I am trying to help but she is isolating herself and I don't know what to say that will pull her out and get her home.

She is 22 years old so I cannot force her against her will.