Packages sent back 'by accident' then LOST !!!

I found two slips stapled to each other wrongly delivered with a notification to collect a parcel, when I called to confirm I was told the parcel was sent back already by mistake. I have been trying to retrieve it since October 2014! I have spent hours on the phone, sent countless emails with responses that it was requested to be returned to my post office, now it 'cannot be located'. This is the second time the SAPO have 'lost' my property which was NOT returned to the seller as I confirmed with them. I still have had nothing useful done and I try and avoid using the SA postal service at all as they have cost me thousands!! are the employees *********** to not read a date correctly or do they just help themselves to whatever and the report it as lost? I am fed up and don't see the point of the post office even hiring people because us as customers end up doing their job to try locate out item that we PAID for already. It does not take 11 months to figure out who is to blame or where the package was 'lost'?! absolutely useless, rude, *********** service from all parties involved. JIMC and SAPO are a waste of tax money!!!