I know from personal experience while a JW, that people
can be reserved/hesitant about helping someone in crisis, seeing them through, helping
them to come out on the other side. So much for that Christian love which you
think should move persons to at least point you in the right direction if they
themselves cannot or are not prepared to help. So kudos to you for not
abandoning this girl.
You may find to be of interest the following presentation
by someone who had a similar experience of hearing voices as result of trauma from childhood sexual abuse:
There is even now a hearing voices support
group (Hearing Voices Network) – no place for demons there.