poor customer service/claim not payed

I do not see a use for my medical aid anymore Discovery is just milking my money and not delivering. Jan i moved to Jburg so on the 15 Jan i wrote on their Facebook page to change my network Dr as in on Keycare. a lady Dimakatso called me me so she email me the Dr i must choose from. 16th i sent her a mail back with my Drs. recently i went the Dr only to find out the Drs were NEVER changed :(. i had to use out of network Dr. The dr sent me to the lab to do some tests assuming my medical would pay but got a mail that the claim was declined called the call center they explained but still dont understand.