My partner has schizophrenia, insomnia, depression, and I don’t know what to do

His parent died. Now he hears voices, things and smells (for example rotten corpses) every day. He is also extremely anxious and his insomnia has now worsened. This made him depressed also but it’s not the depression that’s bad, it’s everything I just said that’s worse in comparison. His suffering is unbearable
His family doesn’t know anything, to my knowledge, apart from basic things like “he’s sad”. I pestered and pestered for him to TELL HIS FAMILY ABOUT THE ISSUE, but he won’t budge
He doesn’t communicate anything with me because “I wouldn’t understand” so it’s pointless
He doesn’t want psichiatric help or however you spell that, he’s adamant on not going to the psychologist. This is because it costs money for him (he moved to another country) and he doesn’t want to bother his parent financially.
He won’t call mental health phone numbers because, well, I don’t know, he’s just very adamant on NOT GETTING HELP
I thought of asking his sister and telling her everything, but she’ll laugh at me with him and tell me I’m doing too much (as said by my boyfriend)
He will commit suicide if I wasn’t here with him, so at least my presence is good. But I don’t know what to do, I’m stuck