Subscription currency not changeable

I would like to do my first subscription of my inreach mini 2, but the amount is always in euro.
On the Garmin website in Australian dollar it’s $25 for the cheapest plan + $70 activation fee ($95 total) I would accept that for my first subscription.
But on my device which is set to australia, same as my account, it’s still in euro and doesn’t change, whatever I do.
It says 18€ plan + 50€ activation fee (68€ equal to AU$110)
Guys that is scam, can you please help me I don’t want to pay unnecessary more money for the same product.
Thank you and kind regards!