Shocking customer service from Discovery Medical Aid

I am grossly disappointed that within 3 months of joining the medical scheme my premium is increasing. I called the scheme earlier asking for communication that informed me of this increase when I joined and the answer I got is "we are very sorry that you were not informed of the increase when you joined but there's nothing we can do". Really? Sorry is not going to compensate my pocket. This is shocking and extremely disappointing. Though Discovery may be the top medical aid in South Africa currently they must be very careful about giving their clients poor customer service because this is how an organisation starts to deteriorate and competitors and new companies soon take over its market share.