Microsoft Office licences and subscription codes are region locked and cannot be used in another location, you will need to contact Microsoft Support directly to ask them if it is possible to change the subscription and if necessary pay the difference in the subscription price, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option