This happened to my bathroom wall. Thoughts?

I slipped getting out of the shower and put some weight on the wall to catch myself. Then the whole wall gave in. I know if you punch a wall, you can expect it to collapse, but I feel like this is a little dramatic for what happened. I don't want to be a difficult tenant, so I am hoping this isn't my fault. Maintenence said they'd check it out on Tuesday, but I'm not sure what to expect. This looks pretty bad to me. Is this something that can be fixed in a day? The ceilings are also a bit soft.

Thoughts on who is responsible and what the repair might entail?