How do we help a neighbour with mental health problems?

We are a small block of 6 units in the inner west.  Our building has had a fire order placed on it and we are undertaking appropriate works and actions, which are going to add a significant cost to the levy/capital works.
Of the 6 units, 3 owners have had cause to take out AVO’s against an elderly female owner who resides alone and has no known family.  She is verbally abusive and intimidating to others, and at times has physically assaulted a resident and been charged with malicious damage of property (the owner who was assaulted has since moved out but remains on the strata committee).
We have had significant concerns for the mental health and wellbeing of this owner for several years and her behaviours seem to be escalating/her health deteriorating.  She has now defaulted on her levies and the strata manager has started debt recovery proceedings – which we are concerned will trigger further abuse and difficulties within the building.
Previously we have had to call both an ambulance for her and Fire & Rescue due to incidents in which she was at risk of danger.  Contact with the Police has been regular but they have not been able to easily get a hold of her (as she will not come to the door) and have sent mental health teams who also have not been able to make contact, so give up. She has failed to attend court summons’ for the AVO’s and other charges.
Our strata managers have not been able to provide much support or guidance (we are seeking new managers due to dissatisfaction with their services) and would love to hear from the Flat Chat community on ways we can support our neighbour by linking her into effective services and financially protect other owners.
I am sure that other people would have had similar situations in which there is a combination of mental health/dementia, AVO’s and interpersonal difficulty financial hardship and social isolation?