I’m so sorry that you are living in the middle of a vipers’ nest. I can’t even imagine how that must feel for you (((HUGS)))

While I agree that it’s definitely the best thing for you and your mental health to stay safe in the safety of your apartment, your neighbor desperately needs to be hospitalized and her support system has clearly failed her...

In your position, I would call the non-emergency number of my local police department and describe ONLY #1 her medical situation as you have described it to us, and #2 that she is being isolated, and ask them to do a welfare check and if you can remain anonymous (not that you should care because you will probably be saving her life).

I hope this helps.

And I hope that there are much better things to come for you soon. You have been through the f’ing ringer (((HUGS)))