Teaching folks how to fish only works when they are willing. Maybe a ministering sister or brother can take over collaborating for a time.
Lack of trust, overriding fears, limiting perspectives, etc., can be very difficult for 'outsiders' (or 'insiders') to work with, and at times require professional involvement.
Sometimes we just need to let folks teach themselves. I've learned to allow people to determine when and how they would be willing to accept help. Also, when they can't get past one or more limitations I disengage, to minimize their stress as well as mine. Another perspective might be, at times we probably each need to learn some stuff the hard way.
Currently, a member attending our Sunday meetings is extremely private about their personal information. They won't share their birth date, so we can't bring in their member record. Also, I think we're not quite sure where they live. And, one of our kinda 'old timers' remembers this person from decades ago, and dealing with the same issues. Dealing with mental health issues can be a real bummer.
Best wishes.