Poor service

We are currently in classic comprehensive with discovery which is not cheap.i am taking injection for hormone replacement which was previously covered in full as of this year discovery will only be covering a small portion and have advised an alternative be taken.Tge injection which I was taking was taking was once every 3 months and the alternative is 2-4 times a month and if taken over a period of 3 months would work out more then the one taken once every 3 months.Paying so much for the medical aid and not getting full cover is really not worth it at all and we would be considering other medical aids should the medicine not be covered in full