Speed services smet

I sent a package from nz 16th may. It was attempted delivery on the 25th may at 18h08 according to parcel tracker. I queried nz post who escalated it to sa post office. At the same time, i called sa post office who is offline and referred me to speed services couriers. I was told the couriered documents are laying at belville. I asked how did we pay for courier for it to be left at post office. The customer service agent then started shouting at me. I asked how does the system say attempted delivery if its laying at the post office. She told me not to tell her about the tracking site because she is telling me i must send a messenger to bellville post office. I am in nz. She kept shouting and i kept saying dont shout at me so i said dont f*n shout and she then said f* you to me. I am reporting this to all and sundry because it is false advertising internationally to charge nz post for courier then to drop it as post office amd demand the sender sends a messenger. Belville post office btw does not have it because i called. We will sue for the value of the package and associated legal costs.