Bad Customer Service

On Tue 14/08/2018 14:28 I sent an email to SA Post Office Customer Service regarding my purchases from China, that is sitting at the Joburg International Mail Centre. No response has been received until now and no one answers their Customer Service Line. How are we supposed to communicate?

Tracking numbers from China are: RY ********** 12CN RM ********** 02CN

Please can someone give me feedback, thanks.