Hi and welcome to SR. My opinion? No you dont need to call those people back. If she is doingg poorly there are state and county programs where she can get free and reduced cost assistance. It is not your responsibility.
However, if you want the calls to stop I suggest you answer them and tell people in no uncertain terms that you are not going to take care of her and you have no interest in hearing about her. Let these people know that you have no intention to talk to any of them about her again