MN nursing home filed against my credit since Father passed away. Anyone else encountered this?

I was Power of Attorney..My father was sent to a NH from a Hospital in September 2012. Previously he was housed at another NH before his surgeries. He asked me per push of NH as Durable Power of Attorney. He was in early dementia, lost use of limbs due to VA operation in replacing of hips and contacted MRSA. He was sent to Hospital for surgery due to severe case of MRSA that was in extreme sepsis. Doctors released him to MN NH. He had some money which quickly ran out. I filed out paperwork with the state of MN for aid for my father starting September 2012 and every three months after that. I have all the paperwork and letters. State of MN demanded I give them paperwork that was held by my sister who previously was in change of my fathers account. My father asked me to take over as sister stole $40000.00 from his account during his stay in the Veterans Hospital. she was on acct also. I live in CA and my sister refused all communication. I communicated these issues to the Social Workers. When I was able to provide information they requested, they would come up with something else to request knowing it would be a difficult time meeting their new demands and each time I met their demands they demanded something else and rejected the claim to help my father. My fathers money ran out in Feb. 2013. In March, after my father was hospitalized yet again NH called me and insisted he be put on Hospice which stops all medication to my father due to his MRSA. Fearing my fathers situation, I called his doctor and reported to his Physician at the time who told me there is NO Way my father is ready for Hospice. Physician state reasons were: dad was still able to get himself around, could hold an intelligent conversation and had quite a personality. He was not on deaths door as NH stated. Physician said yes the time will come but he is not anywhere near it now and NH was wrong about the Hospice. NH continued to badger me about putting my father on Hospice. I continued to file the state paperwork for aid every three months. MN Social Workers would reject my father and I would refile to reopen the case. In June 2013, NH sent me an eviction notice for my father. I called NHs attorney, who stated not to worry as it is just a formality and NH cannot put dad into the street as that is illegal. NH turned the case to a Police who called me. I explained the situation and he expressed his frustration at the misuse of police time. I told the Detective I have proof of everything and am more than happy to provide it for him. Case dropped. They did this twice both times it was dropped. In July, I was notified that NH was receiving Dads Social Security check. I was weary in August as my father severely declined and unable to meet the last set of demands by Social Services. I discussed Hospice with my fathers physician who agreed time was nearing. My father went on Hospice and passed on the following wee hours of the morn. My husband and I had flown out to see him his last few days. His last day as he lay dying, my husband and I were outside in the court yard with the Pastor who was ministering and comforting us through this difficult time. NH finance lady came out to us. This lady demanded that I sign her paperwork to take responsibility for all of my fathers debt. I told her that it is Power of Attorney; she demanded that I sign not as POA but as responsible party for my fathers debts. I was under duress and told her that I refused to sign anything. She kept demanding. I was crying and very upset and told her that I will not now or ever sign anything. How dare she have the audacity to demand I sign anything while my father lay inside dying! What is wrong with you! What kind of evil person are you? My father died 4 am that morning. On the morning of my fathers death as we were preparing to go to the mortuary, I got a phone call from the Social Services lady asking why she had not received the reup paperwork. I told her my father had passed away. She told me to send to her ASAP. I told her that I could not as he was gone and POA died with my father. I no longer can sign anything for him. She kept say I could and it was okay because I had been filing for him all along and this time they would accept it. Even in my grief, I was like huh? I told her I cannot sign per my attorneys advice as POA died with my father. In September 2013, I start getting calls from several different females from NH tell me that I MUST file the Social Security paperwork so they can get paid for the past three months. Only I CAN DO it and no one else. I MUST file and sign. I refused and quit taking the calls. I called an attorney who told me by NO MEANS file or sign anything. Power of Attorney is dead. She stated that the NH has the same paperwork in their hands and it is NHs place to file it, not mine. She said they are aware of this and are trying to trick me into signing. NH filed against my credit with Law firm. Need some advice even emotional support.