Discovery lack of communication

I have been seeing a new doctor since June 2018 as the are the closest to my home. When visiting them for the first time I asked is they work with Discovery and the answer was yes. I am currently on the Coastal Saver plan and as far as I know, if my savings run out I get 3 GP visits. My savings ran out and I continued visiting the new GP under the impression that it will be covered under the free visits as they deal with discovery. I now find out that none of the three visits are covered as the doctor is not part of the discovery network. I received no notification informing me that it's not covered and now I am sitting with a R1000 bill due to lack of information. Discovery truly is the worst medical aid! I then contacted the call center and was informed that I need to go to a GP in the network, I then said I live in Plumstead and the woman could not even give me a GP in Plumstead. Next time inform me as soon as its out of the network to avoid making an even bigger mistake!!!!