Post office Service Delivery

Evening It's been almost three weeks since my package(TC ********** 08ZA)arrived in Johannesburg , yet I cannot find it at my local post office and when I track the package it's still in transit . I've called multiple times but no one ever seems to pick up , it's as if the business is non existence .This is very disappointing and a huge inconvenience for me to the extent that I might never use Post Office service again or even recommend it to family or friends if this issue is not handled correctly.