Levies

I dont understand i though that when you get chronic medication there is no levy, but to me it feels as if i am on the lowest plan of keyhealth but yet very expensive, yesterday i went to get my chronic medication but had to pay a levy of almost a R100, the chemist even tires to give me generic med but it also levied the same amount, so tell me if u don't have R100 every time to pay, what do u then do, do u leave ur medication until u have money that why we have medical aids to pay for our medication cause we don't always have money, the same with my birth control pills there is an amount of R 150 that comes from the health booster, but my tablets are R215 so everytime i also have to pay in, this is really irritating, as i said i dont always have the funds to pay in