International Items missing

Since January 2018 - 100% of my international parcels have not arrived. Sent by various sellers using various services and have not arrived. Common denominator - SAPO Any items that have no tracking is gaurenteed to never arrive anymore. Items with tracking just go into limbo as exported from seller country or having arrived in SA but processing by SAPO has not begun. It appears that postal containers/bags arrive in SA and then going into storage for processing and at this stage the items are in limbo. The individual items will reflect as exported from seller country but not "accepted" by SAPO yet. So at this stage SAPO can do as they wish and no one can do anything about it. SAPO call centre takes forever to answer and when they do the generic response is we have a backlog or cant find any information on parcel.