I had someone try to pull something similar on me many years ago. What I did was to keep coming up with excuses about why the shipment didn't go out yesterday as plan. Dragged it on for a week or three. Then told him it had shipped! Then kept on coming up with confusion on why he hadn't received it yet. Then finally said I was going to send out another shipment, since the first one obviously was lost. And again, not understanding how the shipper could screw up a second shipment. And I didn't have a clue about why the tracking number wasn't working for him...
I hope it drove him crazy.
