Poor service levels from Fedhealth yet again

My son was admitted to hospital on 05/08/2023 for emergency treatment when he sliced open his hand. All the relevant authorisation codes for the procedure were timeously obtained from the hospital for Fedhealth. Correspondence was sent and filed with Fedhealth, communications, follow ups took place when Fedhealth failed to settle the hospital account, and all actions were taken per authorisation protocol. Fedhealth has not bothered to respond to my various emails nor settle the account to date which is fully covered by my plan. The lack of service is a disgrace and not new to Fedhealth, this is the 2nd time