Post Office SA "We deliver whatever it takes"my foot. Remove that misleading slogan

I had very important and urgent items that needed to be couriered to me from King William's Town to Joburg. So I kindly requested my sis to go to the Post Office and ask for overnight delivery services. She did exactly that. That was on the 10th October 2018. She was given the slip with the tracking number, all the works. The parcel was supposed to be delivered the following day or at least 2 days after, but nothing. Its almost a week now and my parcel hasn't even been dispatched from King William's Town. So today my mom went to the post office to try and understand what is going on coz I urgently need these items. She was told that there is an issue with the vehicles and so forth and that I should wait for a couple more days. Firstly, the fact that I requested an overnight service means these things are of an emergency, and secondly, they say on their slogan WE DELIVER WHATEVER IT TAKES......where is the whatever it takes in this case? Post Office SA should remove that slogan because it is misleading and they don't live up to it.