What do I do for someone that’s non family that can not take care of them self anymore?

It’s my roommates wife she is about 60 yrs old maybe 5’0 if that, and 85-95 lbs if that. She has had a long history with abusing drugs from what I’ve heard, only known her for about a year and lived with her almost 6 months. She has a colostomy bag and will not change it how she should. Won't clean up after she’s done in the bathroom, just lays in my roommates bed and empties it in a tiny trash can or lets it leak all over. I have watched her lay on what looks to be puppy pads and just let them leak all over the place. That has to be a biohazard. IDK maybe I’m wrong, it’s gross though and absolutely uncalled for. Last time coming home from the hospital these are the things that happened. She is currently in the hospital right now, was on pain management but was cut off due to dirty urines. She has been in the hospital 3-4 times in a month from an OD to being in pain and so on and so fourth!!! I can not handle it anymore and no one is doing anything about it. She has social workers that come to the house and everything. I guess she puts a face on for everyday and everyone. I need help and I need it now. I’m at my wits end I’m not sure what to do anymore. PLEASE HELP😩😭😭😩