Discovery medical aid problems.

My son was born in Jan, this weekens waa his second visit to the ER...and the second time that we had to pay cash because the discovery system keeps saying that there is no funds, although when I check the app everything is fine.........what would have happen if we did not have funds to pay this out of our own pocket ....yes state hospital when you actual have medical aid, they also struggel evrutime to find my son on the system, the lady said that my son was added incorrectly on the system. The worst of all is that the previous time thos happend we did enquire but still the problem is not fixed i am on the point of changing medical aid