Medical claims *****

I went to Netcare Kroonstad Hospital Emergency unit on 20 April 2018, have a medical aid but was told that must pay R600 cash upfront for Doctor as he is not contracted to any medical aid. Afterwards I found out this is not true, the Dr is contracted to the medical aid, he did submit his claim and was paid directly by medical aid. Dr said he has no knowledge of Netcare collecting money on his behalf and said to both the medical aid and myself he did not get the R600 I paid to Netcare. I want a refund, I was **** to. Netcare can't give me an invoice for R600 and say I must speak to Dr, this is *****, I want my money back.