You can only use one Apple ID at a time in the App Store/iTunes. You can change which Apple ID you have signed into the App Store/iTunes if you want. If you want to log in with the French ID and use the App Store/iTunes for France, you need a valid credit card issued by a bank in the country the store is in and you need a billing address in that country. Once the app is downloaded, you should be able to use it even when logged into the App Store/iTunes with the Australian ID.
Purchases - View, change, or cancel your subscriptions. *
How to cancel Apple TV+. *
Purchases - Subscriptions not billed through Apple *
Link to contact Apple Support at the end of the article.
Purchases - the subscription that you want to cancel is not listed *
Region - Change your iTunes Store, iBooks Store, or App Store country or region. *
If you have done all the above and are still having problems, contact iTunes Support. See the Apple Support articles below for contact information.
iTunes Support – world wide -
Apple Support schedule phone call -
Billings and Subscriptions -
Apple on Twitter -