Anyone's guess, really. Sony did not indicate where that additional allocation would go to and I suspect SA would be low on the pecking order.
Do yourself a favour and save yourself issues: Buy next year once production (hopefully) stabilizes and you're less likely to encounter the initial teething issues that come with early adoption of new hardware.
Takealot have said on Twitter they will only be getting more stock of the PS5 digital in Jan 2021. I assume there's more stock of the disk version but I would say you're looking at very late 2020/early 2021 for either model.