I received the masks which I had ordered from Gadget Fundi today. It took much longer than deliveries from Durban usually do, The parcel was collected on Friday 3 April and under normal circumstances I would have received it on Monday 6 April, or possibly Wed. 8 April, since TCG doesn't deliver here every day.
In fact, I phone TCG yesterday to enquire as tracking didn't go further than showing that it had been collected. They explained that flights from Durban had been delayed. I wonder if it was because of the repatriation of tourists?
Anyway, I received it and it was clearly marked as Medical Supplies.
The issue is pretty much only cargo planes are flying locally.
Previously you would also have passenger planes which carry smaller but more regularly scheduled payloads of cargo as well.