What am I paying for?

We have been loyal customers of Discovery Health for a few years now, and for the most part, we have been pretty happy. I recently phoned to find out how I could go about getting authorisation for a breast reduction. After years of back ache my fear of surgery has been overridden by my inability to tolerate my back ache any longer, sadly I was informed that due to the fact that Discovery is concerned about my long term health they have opted not to cover this particular operation. This didn't make sense to me and I explained that the reason for my needing the reduction is to save my back and prevent future back problems that could turn into something more serious than the daily pain I am already enduring that the medical aid would probably end up having to cover anyway. We pay thousands every month so that we can rely on the medical aid when need be. I have done my research and there are other medical aids that will cover this operation, it seems sad to think that after all these years of dutifully paying our premium I may actually end up having to change medical aid in order to get the assistance I need.