It is most likely the cease that Google may not be able to ship to your country or area, or maybe there is no stock of that Power Adapter at this time. Did you purchase your Devices in South Africa? Or were they from a different country?
Just wanted to jump in here to check to make sure that you saw our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.
Have a great day.
It looks like we haven't heard back from the OP so I'm going to go ahead and lock the thread. If you have any further questions or concerns, feel free to create a new thread.
Have a great day,