over charging people in the pandemic

When for a covid test for my daughter. I asked them if my medical aid cover the test they say yes and quickly do the test, a few weeks later they say my medical aid didn't cover my test I should pay R850. I pay them the R850, then after I pay them the R850 they say I must pay another R640 for the Emergency Room Consultation fee. I had to pay almost R1500 for a covid test.