Needs more help that I can give. What options do I have?

My father had a massive stroke that caused him not to speak and have mental issues. I have Conservatorship over him and after his hospital stay from the stroke he was admitted to rehab. The rehab had wanted to transfer him to nursing home care but I thought I could take care of him. I was wrong. He needs way more help then I can give him. I wasn’t aware he had mental issues until last month. He’s put feces on my wall, floor, etc.. He plays with it. He uses the bathroom on himself. He can take short walking distance. He can’t talk. His right hand is really weak and doesn’t really use it. He exposes himself naked to my children and gets agitated. He was hospitalized in October for pneumonia and fluid around his heart. He was hospitalized in November for colon infection and fluid around his heart again. I explained to his caseworker he needed long term care because I’m not able to take care of him. Plus his doctor ordered him to go to skilled rehab from the hospital. Is what was discussed. Now His case manager waits a week later to tell me he was denied skilled rehab from his insurance (Medicaid). She said he can get in-home care but he doesn’t have a home. He temporarily lives with me and I can’t bring him back to my home. I’m not understanding because my father can’t do anything for himself at least that’s what he acts like. He doesn’t even think to take a bath unless you tell him to. His doctor said he has early stage of dementia and that’s why he’s been acted the way he’s been acting. I don’t feel like he’s safe at my home. It’s only a matter of time he gets agitated and go in the kitchen and mess with my oven or walk outside and try to leave. He needs 24 hour care that I can’t give. I have to go back to work and I have young babies. She said once he’s ready to be discharged if I don’t get him I can be charged with abandonment. What are my options if the doctor is saying he needs long term care?