Incorrect ICD10 not changed after numerous requests

My son was at casualty on 5 Sep 2021 after blacking out and falling, hitting his head against the floor. He had a panic attack once he was conscious again. I took him to the Netcare Union hospital just before midnight. He was attended to and released by 06:00

The account ***) however has the incorrect ICD10 code and I've requested this to be changed from F12.0, K29.6, R11, U07.2 to S06.00, Y34.99

This has not been changed after numerous requests and I need this resolved as i cannot claim from my gap policy and with Netcare delaying the process, they will be held liable for the payment of over R4700 for pathology.