What do I do now? I thought buyers can't charge back for digital items. or anything for that matter. And I've already pushed the domain..
Mass pay is only for avoiding fees but you are still open to any chargeback. As DON mention make an official complain letter to your registrar support and contact Paypal. In most cases Paypal will side with the buyer especially if the buyers account is hacked. You should have use an accredited escrow service especially if it involves min $xxx amount. Goodluck p/s-Godaddy is known to side with buyers too as they will say they cannot do anything about it as you've pushed with your consent. Though there are some lucky cases where the seller got back the domain, among those rare cases were mine