My Mother is now 6 years in AL. Her short term memory is getting worse and she is frequently calling for me to bring her home. Any suggestions?

She is calling me several times a day asking for me to take her home. She says she hates this place and sees no reason why she can't go back to her house. We owned the home she lived in and sold it when it became obvious to us that she would not be able to return home. She had fallen and broken an ankle and spent 3 months in Rehab and then we were going to have her in AL until she got her strength back. She never did get her mind and physical condition to the point that we felt she could be on her own again. She was only 78 when she went in and just turned 85. I have tried reasoning with her, deflecting the conversation and even promising to "look" into alternative placement. Where she lives isn't the nicest place, but it is in her price range and they have a Medicaid discount. They treat her well, but she doesn't think they do. I'm just at my wits ends as to how to respond to her constant requests to bring her home. When she fell I tried to have her with us, but it nearly killed me to take care of her. I am 65 and disabled. No other family close by to help. I tried getting callers from church but she is such a Debbie downer no one wants to visit with her.