I'm sorry about your mother's health and the fact that she's currently in the hospital. I know how that is.
On a short-term basis, there's no good reason to try and file a complaint against the hospital, and you won't get very far. You can visit in person and then if your mother has a double room, befriend the roommate - and call her for a report. Or try to befriend a nurse, who may at least contact you if there's been a change in circumstances.
Another option is to find out whether there is any type of social worker on staff (there usually is), who may be more willing to talk with you then a nurse - especially is you can be somewhat creative with your questions.
It concerns me whenever there are family/POA problems. First, be aware that a person with POA (an Attorney-in-Fact) does not exercise any control over the person, such as your mother....the AIF is supposed to act in the person's best interests at all times, and follow whatever order is in the POA.
On a longer term basis, you have the right to file an actiona for guardianship (called conservatorship in some states). You don't have to become guardian (conservator) - it can be someone else, such as a professional guardian/conservator, or simply a different family member. However, the court will want evidence that the current AIF is not performing his job, or is no longer capable himself, or something similar.
May I be of any further help? Just write back!
Otherwise, please click on "accept" or I won't be paid even a dime for my time.
Jane Doe Deer