2 year old claim still unresolved

I gave birth to my daughter in January 2019 (2 years ago) at Kloof Mediclinic. I was going to give birth naturally and I got an epidural from Dr I. Melvin (the anaesthesiologist). After a few hours in labour my gynaecologist, Dr. J Kotze, decided to do a C-Section. Dr Melvin gave me another epidural/ top up in preparation for the C-Section. Doctor Melvin's offices have been contacting me for 2 years now asking for additional payments for the epidural (which should be covered by the medical aid) and I have sent various e-mails through to Discovery's complaints and claims departments to ask for the payment of this 2 year old bill, and also an explanation as to why this still has not been paid. I have not gotten responses from Discovery pertaining to the above and I am getting very frustrate, seeing as Dr. Melvin's accounts department is seemingly hounding me. I would like for this to be resolved as quickly as possibly, and unfortunately have had to resort to this platform seeing as nothing else seems to work. My daughter in nearly 2 and a half years old and I am still haggling with my medical aid for birth costs. This is simply unacceptable.