Shocking attitude and service!!!!!!!!

I am disgusted in the service and attitude of Discovery South Africa I have been going to the same medical practice for over 10 years and have always been able to use the out of saving extender benefit for GP consultations. But now they are refusing to pay, according to the practice they were not informed that they were no longer on the panel and only when patients start complaining were they made aware , and according to Discoveries call centre they were never on the panel (but they have always paid) they are now refusing to pay and are saying it was my responsibility to find out if they were on the panel. Why would I need to find this out if they always were on the panel. When I told them that I will be going to the ombudsman I was met with a rude response of "go head" I am so sick of them taking our money and trying at every point not to pay out what they are required to payout, this is not the first time this has happened with them, they use the fact that people are not educated on medical aids to get out of paying for things that they are legally required to pay for.