What a god damn mess.
Anz are bouncing refunds made to a closed card, forcing the consumer to chase this up with the merchant. Easy enough if this is a brick n mortar shop where you can explain to a normal person but try explaining this to the overseas reps at ebay or paypal who go along a predetermined script. What to do when both sides are adamant no refund has been received and refund has been issued? Does a mass string of chargebacks hurt your banking profile in any way? Im looking at a string of about 10+ transactions for small amounts.
Try AFCA.
https://www.afca.org.au