Double billing and no interest in interacting to explain/resolve it.

I visited the ER at Netcare PTA-EAST with my boy. Cant say that i didn't receive professional service. My issue is more with the billing. (As a side note. We took him for a physical 4 days before the visit. broad-spectrum blood tests and x-ray's of his chest. He is going to start to play rugby for the first time. Nothing to do about the ER visit symptoms.) the doctor requested new x-rays of the chest and new blood work which seems odd to me as it was done only a few days ago. So the Billing. the doctor billed me for 2 visits. Was fast to call me and tell me that there is a part of the payment that wont go to Medical aid. I paid that. But they are ignoring me after the emails I send about the double billing. They will now have to explain to the HSCPA as I tried reasonable times to engage them.