Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello, good day and thanks for your question. I understand that you are moving from one country to another in which your Microsoft 365 Family subscription is also expiring
In this scenario and to add to the above, it is best to update your information first via https://go.microsoft.com/fwlink/?linkid=2195908 and this also includes changing the country and then add the card that you will be using via https://account.microsoft.com/billing/payments.
Once you have updated the information, you can subscribe again using the same Microsoft account that you have used and this should get you going again with your subscription.
As you have an existing subscription, you will need to cancel it first or wait for it to be expire before subscribing again and then you can go to https://account.microsoft.com/services/microsoft365/billing and try it from there or try to turn off the recurring billing at https://go.microsoft.com/fwlink/?linkid=2277073 and you can also follow the guided steps indicated from the link below.