The citizenship issue is more about keeping South Africans in jobs. As there are no training bonds, it does not make sense to train foreigners, and then have them leave for greener (sandier) pastures.
The hiring ban is an internal company policy to reduce costs, there is no industrial element. Interviews will probably restart when they are ready to employ again.
Apparently, we are getting rid of 20% of management, but those are likely to be our only job loses for the near future.