My friend doesn't really want to leave his apartment, either. Whenever one paranoid scenario in his head is proven false, he already has another one in its place. My friend won't talk about anything over the phone, either. He looks at the walls all day, too. I've encouraged him to take up hobbies, or watch tv--At least he's watching television now, though without the volume on.
The television was a hard thing for me to watch when I was not feeling well myself.
A case manager should understand that people with mental illnesses have many different problems that recur. I hope the CM has not washed his/her hands of him.
I had a doctor who didn't listen to me when I was trying to avoid hospitalization--After I got out of the hospital, he apologized to me for his inattention. Then he blamed me. (This doctor didn't know about answering machines--He was really old-fashioned and thought he got a wrong number because he didn't hear a woman's voice on the message announcement. In effect, he never returned any of my urgent-but-unanswered calls.
A relative would call me and act out on the phone until I finally said in a calm voice that I couldn't help him; that he needed to see a psychiatrist. I had to say that each time he called until I had to change my phone number. He did get the help he needed when he finally hit rock bottom. I realized that there wasn't anything I could have done for him. He had to do for himself.
I don't know if PROS is all over the country. It stands for Personal Recovery Oriented Services.
If he's in a day treatment program and actively participating, that is very good, because it means he's serious about recovering to whatever extent that might be. If he goes to a day treatment program and just sits in groups, well, that's okay--At least he's getting something out of it and adds structure to his life. It doesn't sound like he's able to work right now, not with blockading himself in the apartment, not wanting to talk on the phone, etc.
It took 10 or 11 years before they finally got the right combination of medication for me. They are still trying to find my friend the right kind of medication.
www.NAMI.org has support groups for people with mental health issues and their families. www.reintegration.com was a good resource for me for awhile. I don't know if it still exists.
It's late and I'm tired, but I want to add that you might feel responsible or guilty about not being able to help him. I hope you won't do that to your self.
All the best.