Clearly it is a training flight, so it sounds like the CFI has acted illegally in "instructing" in the US of A if their AOC says otherwise. What a bunch of prick$ they are using your airplane to give instruction to a raw student while being paid to ferry it on your behalf. BTW, what sort of aircraft are we talking about? Did they do any damage?
A Glass Panel Mooney Ovation, and a gear door was damaged due to a heavy landing at some stage after handover and prior to delivery in Oz. Fortunately I have pictures before they took it (just in case).