Getting a student visa in South africa...?

I’ll be heading home in January for a short visit and will be renewing my student visa…hopefully.

Do the Jhb and Pretoria liasion offices issue 60-day extendable visas, as per HK? Or will I only get a 30 or 60-day non-extendable visa, which I’ve been told can be extended by the Foreign Ministry in Taipei?

And will they accept a student certificate from CLI, TLI and/or Providence University (Taichung Uni)?

Anyone SAfrican done this and know the results?