Medihelp - Bad choice for your parents

After being with Medihelp medical scheme for a lifetime I have to move my Mom now to Discovery medical aid. She has to get a knee replacement but Medihelp does not pay for knee or hip replacements that was caused by wear and tear. I strongly advise people to move their parents to medical aids that cover for this, as my Mom has to live in pain now for another 3 months because of the waiting period with Discovery. I am disgusted.