Hello Bcrawford: I see this is your first post here on PC. So... welcome to Psych Central.
Unfortunately I don't think I would know what to tell you about the situation you describe. Assuming your friend is an otherwise competent adult, I don't know what you could do to stop her from "spending" her money as she chooses. If you know who it is who is scamming your friend, I suppose you could try contacting some law enforcement or other governmental agencies where your friend lives & see if there's anything that can be done. But, honestly, I doubt there may be much that will come of it.
I'm not a mental health professional. So I would not be able to offer anything authoritative with regard to what may be going on with your friend in terms of her mental health. However here are links to 6 articles, from Psych Central's archives, on the subject of delusional disorders & how to cope with someone who has one plus a link to an article on how to talk to someone who always gets defensive. Perhaps some of the insights & suggestions in these articles can be of help in your efforts to aid your friend:
Delusional Disorder Symptoms
10 Things You Should Know About Delusions | Caregivers, Family & Friends
Delusional Disorder: 8 Ways To Communicate Without Fighting | Caregivers, Family & Friends
8 Ways To Cope With Someone Who Has Delusions | Caregivers, Family & Friends
Part 1: Getting Through To Delusional Beliefs | Caregivers, Family & Friends
https://blogs.psychcentral.com/careg...dium=popular17
https://psychcentral.com/lib/how-to-...ets-defensive/
I hope you find PC to be of benefit.