Risk of being kicked out of school

She's on her last chance now. I had a phone call yesterday explaining how rude and vile she was to majority of staff. 

When she is there, I don't know what happens. She says staff aren't helping her anymore and all they moan about is her work. We have a new agreement, do your work or go home. This is the same if she's pacing the school and refuses to go into a room, she will be sent home. 

Now all she thinks staff care about is her work and not how she is feeling. Apparently, don't know how true it is, but she was crying her eyes out, really overwhelmed, completing her maths work in the classroom and no one gave a crap that she was crying and needed to calm down. 

She thinks they don't care anymore. Her mental health is extremely bad. Last night I had to hold her to keep her safe. She was saying she hates life in general and struggles everyday but still loves school. She said that me and my husband don't help her either. She is not in a good mental place and wanted to take her life. This morning, she does not have those thoughts but is still in a bad place but is already on the bus on the way to school. 

I fear something bad will happen and I hate seeing her like this. I don't know what to do but be there and listen if she wants me. 

School on the orherhand, I am clueless. This is her last chance and I can't see her lasting much longer, mentally and at school. 

If anyone knows anything we can try, that is just perfect.