As per SA team's comments above, they obviously didn't ask for a crumbling pitch. They asked for pace & bounce. Quite often even when home team asks something, it is not necessary that groundsmen and curators agree and follow it. Just previous match was one example.
Surely SA purposely would not have asked for such a pitch but for sure SA would have put a more emphasis on a pacy track. And considering how much talk the pitch generated even before the match started and how much grass was there one day before the match surely was an indication that it was going to be a crazy track.