Type 2 Diabetic chronic being paid for in full (cash) -Discovery refuses to approve

I have been Type 2 diabetic for 22 years now and have always been on medication for it. 2 years ago my new GP put me on syngardy(discovery refused to pay but I agreed to pay cash) and the results were astounding, everything improved,HB1C,Kidney function etc....last year my doc suggested I use Ozempic in conjuction with Syngardy to help also with my weight . Discovery paid R950 towards my ozempic from chronic for 1 year, EVEN BETTER results a year later. So now that my medication is actually working when we tried to get Ozempic approved for another year discovery refuses to pay. So I am type 2 diabetic and Discovery pays nothing towards my chronic condition!!!!!!!!!!!!!!!!!!! What am I paying for then!!!!! This is ridiculous and they cannot get away with this!!!!!!!!!!!!!!!!!!!!