Poor service SA Post Office

Good day.

I urgently need someone from the SA Post Office to call me regarding registered mail I sent. It is now weeks and still did it not reach its destination. When I use their tracking service it is either not able to process my request or it shows that it is still at the BFN hub. When I call the BFN hub they say it is at the JHB hub. JHB is constantly "experiencing high all volumes and your call will be answered" which is not answered. I just get cut off. That piece of mail is needed urgently. I am dissatisfied with the poor mail performance of the SA Post Office in general.