Medihelp's claims handlers are apparently illiterate

I recently submitted a claim for an x-ray which I had paid in full to the service provider. The invoice I sent to Medihelp even showed the amount owing as "paid by credit card". Despite this Medihelp sent me a statement to the effect they have paid the service provider. So the Radiologist has been paid twice for the same x-ray, once by me on the day of the consultation and now again by Medihelp. Can Medihelp's employees even read? Whose credit card did they think settled the bill on the day of the consultation? I sent an email querying this 5 days ago. Nobody has had the courtesy to even acknowledge receipt of it and today I have been sent a second claims statement confirming that Medihelp paid the service provider. I'm out of pocket because claims handlers don't, can't or won't read the info sent to them. They must chase the service provider for a refund as it is their sheer incompetence which has caused this problem. I want my money!