Not Sending us Account

We complaint about double charges on the account / charges that was added after patient was discharged. The Lady phoned us and told us there was a problem with the account and we only owe the one amount. She said it was for an injection for the baby. Then when I told her the medical aid should pay the stuff for the baby (because baby is covered immediately on the medical aid). She then phoned me back telling me that the injection was for the mother and not the baby. Then I told her it's fine she should then rectify the account and send everything in an email so that we can pay and have proof. I'm still waiting ......