Parcel not received. RD***ZA in transit for 3 weeks ! What now?

My husband's artisan certification was sent from Olifansfontein 11 Sept 2018 and arrived at Witspos 17 Sept 2018. To date, the parcel has not been received and the tracking status never changes. RD ********** 44ZA is still in transit. Today is 5 Oct 2018, almost 3 weeks and still waiting.