Accounts unclear

I went for a painblock procedure at Anncron hospital in Klerksdorp. The surgeon who did the surgery app**** at Discovery health app**** for the procedure on my behalf for acceptence and at the hospital for a theatre date. Beforehand everything was approved for financial payment as I wanted to know if I had to pay in. I was informed everything will be paid. Then a week I get an account from Dr. Swart account department that I owe hom R4400 in expenses. But not shows on my Discovery app. On my Discovery app it clearly states Dr. Swart was paid fully. I want it clearly explained.