Gems medical aid increase way more than expected

I am highly disappointed with gems medical aid every year it goes up a percentage which is about R400 - R500 this year the medical aid jumped to R1500 extra, I am now earning way less than what I started with equivalent to a lower post thanks to gems making such drastic amount changes how can they do this to us! This is very unfair that I now have to get such a major deduction with the cost of living going up and the amount of tax we pay we now have to pay way more than usual for gems medical aid plus get charged for every visit or medication you buy! Someone needs to look into this because it's crazy!!