Non payment to hospital

I was admitted to to Bay view hospital in Mossel bay on the the 20/09/2015 for a peptic ulcer related to medication taken for pancreatitus. Only after I was discharged I was informed by the hospital that I owe them R18000 because discovery refuses to pay. I have repeatedly tried to contact them and they do not give me any information.<br> <br> I was admitted in March of the same year for pancreatitus and everything was paid in full. Why not now. The doctor admitted that the ulcer and pancreatitus was related.<br> <br> I was again admitted on the 10/10/2015 for a bleeding ulcer but was told yesterday to leave the hospital due to the fact that discovery refuses to pay but at the same time yesterday I recieved an authorization number. Attached is a pasting of the mail and number.\Dear Sean<br> We have received the preauthorisation request for your hospital stay. We realise there is a lot to arrange before any treatment. This letter will help you to prepare.<br> The authorisation number is ***9."Can someone tell me what is going on. I will be forced to go to the ombudsman or seek legal assistance. Why would they kick me out of hospital when I recieve an autherisation number??? My ID ***"""