Updates to South African Postal Services
The current extension allows you to add Small packet services - however it should not be under 2kg only - it should also have under 1kg - the reason being over 1kg the rates are more expensive than air.
EMS should be added to the SAPO service options - EMS is the expedited service that runs through the Global Post Office system.
Also can you state when last you updated the Rates - the SAPO changed their rates in March and it looks like the rates have not been changed inline with that. Currently it shows postal registration fee as R25 and the current rate the post office is quoting is R39,80.