To be honest, best thing to do is not report him and hope he leaves something in your account and gives it back to you. Your, let's call it attacker, is clearly not really smart, I mean, moving items from an active account, replying emails. This will only get your account banned, and won't get your items back.
Also, if I was that dude, and knew I was getting banned (as he probably knows by now), I would just take the items off the account and gift them to random strangers, just to mess with you.