Settled account and no feedback received

Good day I am having an ongoing issue with lancet and the accounts department. I received a notification over a month ago to make payment for an outstanding amount for my baby’s hospital bill for November. Firstly no account was sent by lancet initially to the medical aid to make payment at the time. When we were informed that there was an outstanding bill this was sent to medical aid and all amounts settled. To date I am still receiving notifications for the amount that has been settled. I have made numerous calls to the call center and have sent an email last week and 2 days ago with all the confirmations of payment to which I have received no response. Hoping that raising the matter on this platform will receive some attention. Ruvani Reference received on the email was y***3