Medi Clinic doesn't care about their patients

My wife was not properly diagnosed. She was discharged while with a severe back pain. Instead of being transferred to an appropriate specialist while at Medi clinic, she was told to go home and make an appointment with that specialist. Only when she complained was she referred to an available specialist. This could have been done before she was incorrectly discharged. The new specialist deemed her condition as requiring urgent attention and surgery. Previous specialist deemed it not urgent, without doing any examination. The hospital was extremely negligent, putting a life at risk. They can't even admit their mistake. Their management is defending the doctor, saying he was too busy on the day. Was she so busy that she sent a sick patient home without getting to the root of the pain or refer to another doctor that's available at the time. The whole experience is quite scary. People die before of such negligence.