So from what Ghost said, he didn't exactly file a complaint, but just cancelled an invoice.
At first, I also thought Ghost might have "jumped" on and filed a PayPal claim or complaint, but after reading some more, it's clear to me that Ghost only cancelled an invoice (which is no big deal), and whatever happened on Synjin's side the transaction is really not directly the cause of Ghost cancelling an invoice.
I don't see any problem with this, just a bit of complaining.