Unprofessional customer service

I left Hosmed because I heard Keyhealth was the best and too professional.

I registered my wife to their Baby Programme on the 24th of January this year, and after few visits, she was told that the medical aid didn't pay for her previous consultations with a gynecologist. I went to the specialist and he gave me the claims to submit to the fund, and I did, but I still didn't get a response from them and the claim remained unpaid. My wife went to the Gynecologist this afternoon for her appointment, she was still told the claim is not settled. I emailed them last week and I called them today but I still get no response from them, what a way to treat customers. Which body regulates medical aid that I can complaint to them just to get feedback from my medical aid? I'm frustrated and exhausted when all I get is an email to say we will investigate the matter but I get no any other response. My membership no: ********** and my query ref no: WF ********** 64