Is this ethical practice?

I have been a Bonitas member ever since I can remember. After my studies I started paying my own medical aid and became the main member (no waiting period, as I was a previously on my parents' plan). My husband then subsequently joined me and had to undergo a 3 month waiting period, which was understandable as he had not previously been on any medical aid. So my children joined.

In 2018 my husband, while being covered by Bonitas, was diagnosed with a non-malignant tumor. The prognosis was to determine growth and then decide whether it had to be removed sooner or at a later stage.

After this revelation I was permanently employed by the Western Cape Education Department. They do not subsidise other medical schemes and I was forced to move to GEMS. We sent all the paperwork and we were all immediately covered.

I have since quit my job in pursuit of my studies and can therefore no longer, even if I wanted to, stay with GEMS.

I reapp**** to Bonitas and was shocked when they put my husband on a 3 month waiting period. I would have understood had we not been with them before or even if the diagnosis happened during our time with GEMS. They are saying that their policy states a 3 month waiting period on pre-existing conditions - even if the person had previous medical aid. That seems fair BUT...

This information does not clearly state that this applies if the person was previously with Bonitas and diagnosed while a Bonitas member. What a joke. How can this be ethical?