bad service

i am on the key care plus option and the doctors seem to give you medication that do not work, I have been to 3 doctors in the last 3 weeks and I am still sick, Doctor Ryan Devanathan advised me that my plan would not cover the medication i need and he will give me what they cover and i must pray to god it work, Discovery seems to take the doctors off there panel that do give you the correct medication, Its seems that i need to change my medical aid