Horrible service from The Courier Guy

We always had good service from them until now. We sent stationery packs to a school in the Cape on the 2nd of February. It's now the 8th of February and the packs are still waiting in their Johannesburg hub. I called them 5 times, 4 of which I was cut off after waiting a long time. They said they will call me back and I'm still waiting for them to do that.