Medihelp impossible changes

I have had a reply from Medihelp both telephonically and by email. They claim that when I filled my generic prescription on 30 January, another cheaper generic had become available and I should have asked for that. The newer and cheaper generic is called Prerica. How is it possible for a patient to ask for a new generic that has just become available when the patient does not know and the pharmacy does not know???? In addition Medihelp did not address the issue of their on line chat consultant advising me to go home and phone around until I have found another pharmacy who has a cheaper generic and I should change pharmacies. This is insulting to me and my pharmacy to which Medihelp has directed me in the past. I am a 77 retired doctor and am not stupid. I do not have the resources to sit on the phone and to phone around to other pharmacies to find out about generics I do no know the names of. I asked to speak to Medihelp Medical Doctor and although promised am still waiting. I pay nearly R12000 per month premium and something has changed in Medihelp I think it is my right to complain and to ask to speak to a medically qualified person.