How frustrating. Do your damn jobs, is right.
Glad she has you for an advocate because you're right, an advocate is necessary.
It sounds like she is stable so far ... ? Very glad of that. Hopefully she can get home into familiar surroundings asap.
Re the HOH, my father, who is profoundly deaf, had the same issues in hospital. The nursing staff just DID NOT choose to get it and breezily talked while they were facing away from him, or mumbled, or whatever - they never took it seriously no matter how many people I talked to. Utterly frustrating.