Like I said, if he doesn't respond keep it.
In any case, he is supposed to be waiting for contact from you either way, so he should be waiting to get your guitars after you tell him how awesome that Ibanez is right?
If he doesn't respond, keep it.
If he does respond, tighten the truss rod as much as you can and box it up and send it. All on his dime of course. Urinating on the guitar is also another option I would consider.
There's no doubt he knew what he was doing, I wouldn't be surprised if he doesn't respond back to you if he sees any hint that you know what's going on.