Disgusted with Discovery Medical Aid

I was diagnosed with a fatty liver a few years ago and my GP put me on Legalorn forte. I have been alternating between legalorn forte and milk thistle. However, in June I tried to purchase Legalorn forte and found out that there seems to be a shortage in the market - the Dischem in the area that I reside didn't have it and I was fortunate to find it at Clicks - who had it in packages of 30 - so I purchased 2 boxes which medical aid paid for. Yesterday I noticed that Clicks has it, however they had the 100 in a box, so I tried to purchase it - Medical aid rejected the purchase. I phoned Discovery today and spoke to a consultant in the Client Care Services - who advised me that the medical regulations state that I am only allowed to purchase 90 in a 23 day cycle. What am I suppose to do - if the box comes with 100 tables - this is medication sold in the front end of the store - so they are not going to remove 10 from the box and sell me 90. Purchasing the 100 is cheaper than me purchasing 3 x 30 (which they currently dont have stock off). I wasted 32 minutes of my time on the phone with the consultant and when I asked to speak to the supervisor - I was once again put on hold - 5 minutes later I hung up. The consultant advised that I should go get a script from my GP - yes sure at a cost of about R700 - what do they care - its not their funds??? Why does common sense not prevail in this instance!!!