They will submit FOKOL™
All they have to do is to submit that which is not implicating anyone. Otherwise, they can simply claim that everything else, that which the DA seeks, didn’t adhere to strict policy and best practices. It happens, communications and documents get lost or destroyed all the time.
I won't be surprised that the DA will receive records, but will there be admissible records? I predict an exhaustive discovery process leading to nothing. The current ANC administration will not be harmed.
It is not up to the courts to determine how accurate these records must be; it is all internal ANC use.