Help with hoarder situation

I am seeking recommendations for organizations that specialize in assisting elderly individuals who are struggling with hoarding issues. The situation is complex: the individual in question is physically unable to engage in any activities and lives alone, but is resistant to accepting assistance.

Ideally, it would be helpful to find temporary accommodations for them while we work to organize their living space. However, there is a reluctance on their part to leave their home, and when we attempt to address the clutter, they tend to become defensive about their possessions.

This presents a significant challenge, as their current living conditions are inadequate and detrimental to their health. Unfortunately, we do not have financial resources to contribute but are willing to invest time and effort to make the home livable. Currently, the individual has limited access to essential facilities, such as a clear path to the kitchen sink and toilet, with much of the space obstructed at eye level. Given their age, we are uncertain about their life expectancy, and we would like to ensure that their remaining time is spent in a more suitable and comfortable environment.

Any guidance or recommendations for organizations that can assist in this matter would be greatly appreciated. We have looked into the NZ hoarders website but given this individual isn't really of sound mind it's challenging to overcome the psychological aspects of hoarding as a first step.