Rude/*********** lot of people at Skynet Durban

I am awaiting My Unisa Delivery which was dispatched from Unisa JHB & received at Skynet Isando on 13/7/2015, then dispatched to Dbn on 16/7/2015 (I have this tracked in writing). But Cody Chetty & Sharon from Skynet Durban cannot find my parcel & they are blaming Unisa saying that it was not dispatched, yet Skynet JHB has confirmed that they received & dispatched the item. Why are the above people lying, & they are also rude/arrogant. Is this how they ruin the business. They are not doing me any favours as I paid Unisa for this delivery. We have made more than 7 calls and have still not got any joy & assignments are due & exams start in Sept. This is also the 2nd time this year I am having this same problem with the same company,(What are the chances that the same person has the same problem twice in the same year - Is this on purpose), yet when UTI delivered all the previous time, there was no problem. I need this resolved & my parcel delivered urgently, as I cannot wait any longer. STOP THE BLAME GAME.