Foreign Transaction Fee on Ebay Monthly Payment

For the first time I have been hot with a foreign transaction fee on my monthly ebay payment.

 

I checked back through my payments and this has never happened before.

 

I use a Westpac Mastercard to pay ebay fees.  Although I use my Paypal balance also and I notice that the charge is in Australian dollars so no foreign fee should apply.

 

Called Westpac, they claim that ebay has changed their banking.

However, when I look back through my invoices, nothing seems to have changed.

 

Is this just Westpac being difficuly or has anyone else been charged this fee?

I don't see how a foreign fee could apply if it is in Australian dollars???

 

Anyone have any suggestions?