email him a copy of you paypal confirmation receipt, and tell him if you don't have a tracking # within 48hr you will file a dispute with paypal and they will reverse the charges.
In reality paypal will most likely do nothing to help you. Hopefully you payed though paypal via a credit card, if so file the dispute with the CC company if it comes to that, but make sure you remove any bank accounts you have attached to your paypal account before you file the dispute