WORST MEDICAL AID ONE CAN BE ON

My brother was admitted to hospital on 3rd July, been discharged already. He was in ICU and on a ventilator. Discovery declined his authorisation because they wanted a PMA form to be completed by his treating Dr. The Dr completed the PMA form, now they still declining the authorisation as they want the GP to also fill in a PMA form and they doing a whole investigation into my brothers medical history and all his accounts have been rejected. His been on this medical aid for over 2 years now, pays his membership every month and Discovery is treating him like a ******** refusing to pay his accounts and his hospital stay. I want this sorted out asap.