I had an issue where Paypal never refunded the $2 fee for verifying my account and instead pocketed the cash instead. I got my bank to issue a chargeback over the phone - it took all of five minutes.
They're eating the Internet. The more you depend on them, the harder it'll be to cut ties when they give you crap.
Complicating the transaction with a dispute/chargeback could make that real goal even harder to achieve, not just by making the previous purchase attempt appear 'unpaid', but also perhaps giving his account/card a 'uses chargebacks' flag within Google.