Pathetic Service and NO communication

Today I have received a R 15 000 Bill from the hospital that I gave birth at in April 2017, they had struggled for months to get payments from Bonitas and after giving up they come to me with a R 15K bill that I need to pay today. I called the call center and spoke to Sarah-Lee who informed me that the claims were captured incorrectly and incomplete and therefore the claims were rejected. This is news to me as I received NO correspondence from Bonitas as to the outcomes of ANY of the claims submitted. Not only was there 1 claim that was captured incorrectly but numerous ones that I don't know if i paid cash for in competencies from Bonitas's side. Also, I sent an email to Bonitas querying if a particular procedure will be covered under the medical aid, this was sent on the 6th November and only got a response on the 11th November. Not only did I get a late response, but the consultant did not read my email properly and answered with the wrong procedure ! A medical insurance company should be particular in the way they handle their clients as in most (if not all) cases someones life is in their hands. I am disappointed and very angry about the service I have received from Bonitas so far.