My HHA intentionally failed to have my Mother re certified and is now asking me to sign a contract to pay. Advice?

Supreme Home Health has never sent me an itemized statement and has been paid in full by the insurance for all services billed. However,they state the insurance co. will not authorize any more visits because it is now not medically necessary. I confirmed with the carrier that Supreme Home Health did not forward medical records and falsified information on the recertification document in order to have it denied. My mother has been diagnosed with Dementia and Alzheimer's and sees a primary care doctor and a neurologist under the same insurance company who are paid for the covered services in full. Supreme Home Health interrupted service and refused to send the home health aide to my home. They have also asked for money upfront in the past and told me that insurance only covers 10 hours a week. I checked benefits and coverage before calling and they cover 35 hours a week. They changed their story and there was no problem for 2 months until they had to recertify her again. This time they said because we went on vacation we need to pay because the insurance requires a recertification if she goes out of town for two weeks. I have filed a grievance with the insurance company but now I need a reputable care giver which is so hard to find because of the scams they run on the elderly. Who do I report this to besides the insurance company so that other clients will not be taken advantage of?