Ampath Ripping People off as usual

Myself and my girlfriend went for tests at the Doctor and we both had the same tests done. the only difference is I'm on a full medical aid and she is on a hospital plan. Obviously I knew there would be that amount for her I would have to pay. I thought the price was steep but what could I do she needed the tests. When the amount went through my medical aid it was R872.70 less than what I had to pay for her. How is this possible. When I phone Ampath all they say is too bad we charge less to the medical aid. It should be at least equal if not less for a cash customer for two reasons, 1: you have your money immediately and you don't need to wait for it to be paid by the medical aid and 2: if you only have a Hospital plan it usually means financially you are just getting by, now you get ****** from, from the medical services that are provided to supposedly help you. It is a total ******* of the people who don't have private medical aid and we would not have known any better unless I had seen it. Its purely *****ing money from those who you think will not know any better and don't have as much financial backing as those on medical aid.