Refuse to approve heart PMB

We join discovery last year i were on a waiting period of 12 month for something of the brain due to previous stroke after joining discovery second time not my choice of medical aid but company choice them ....last year so much trouble with them the whole year now there is something wrong with heart app**** for PMB new story they don't cover that condition on the scheme but when joining i told the agent i need a plan that cover heart due to family history as we were not aware i will now also suffer from my heart we are on Delta saver pay nearly R7000 pm for what most of my pmb for my lung medication i need to pay co payments nearly R500 pm but yet i went and look and it say i don't need to pay co payment i am sick of this i will go to social media and tell my story as this have been the worst year of my life with Discovery