Parcels Vanishing

I have had several parcels send from China that arrives, confirmed via tracking at Witspos hub and that is the end of the route. Those parcels just vanish and does not arrive at my destination . To phone Witspos hub is out of the question , they don't respond even after several emails send no response from their customer service and track & trace . For example track no RI ********** 52ZA Parcel is at Witspos hub for the past two months . What is going on with the postal service this is the worst service ever . They ***********, no care obout the customers parcels.