Worst customer service

The worst customer service my supplier uses fastway my parcel arrived on Friday night at depot was supposed to be delivered on Monday. When I checked they rerouted the cape town parcel that was in cape town to Durban. Spent 2hours trying to get hold of them waiting 30min on the phone just so they drop the call when I ask what happened. I logged email query also no response. Phoned Durban branch they said it will be sent back to Cape town and now it is still stuck somewhere in transit between the depots and now my customers cancelled as they needed the goods by tomorrow morning.