Medical Malpractice: Non Emergency Medical Transport Cancelled Apointments

My question involves medical malpractice in the state of: Georgia. My father was a paralyzed cancer patient who was relying on a non emergency medical transport company to take him to and from doctor appointments. The last 3 appointments they cancelled on him and on the final cancellation they stated they did not want to take him anymore because his private insurance which their company states they accept was not "paying them enough" according to them. After the first cancelled appointment when they clearly did not want to take him anymore and why they allowed him to keep making appointments hoping they would take him is beyond me. A week later he was hospitalized for kidney failure and had damage that could not be undone. Had he been able to get to any of his medical appointments he would of had his blood tested (as he did on every appointment) and they would have seen his kidneys were failing and may have been able to bring his kidneys back to working function.Doctors said it was too far gone for treatment and he died of kidney failure. My father was relying on this company to bring him to his appointments and they consistently broke them. It's probably a long shot, but is there any case for malpractice here? Thanks

Medical Malpractice: Non Emergency Medical Transport Cancelled Apointments