Discovery decides I don't need in hospital medicine.

I have been blacklisted because of a claim Discovery decided not to pay. I have been battling for more than a year for them to pay it. The specialist doctor prescribed medication IN HOSPITAL with Covid, which Discovery decided I was not sick enough to receive. However my oxigen levels was only 65 and I blacked out. I am also a RA patient which is a outoimuun disease and high thus a high risk patient. When I called the doctor for a motivational letter the lady said. "O we have to right a letter for every second patient because Discovery is trying to not be liable for the meds". It is R6000! Many patients just pay it because they can and don't want to spend the time fighting it. I cannot pay it. My monthly payment for Discovery is already near R6k and my selfpaymentgap was R15k!! Not worth it. I called them and were told that it was paid. It was not! And still I get threatened by the hospital for the R6k every 2nd day!!! I've submitted the motivation 3times now. No reaction....