Miscellaneous topics that do not fit into specific categories.
Hey there! Nice to meet you!
Based on your description: "Apparently, the amount due is in a different currency and needs to be changed."
You will have to wait for the current subscription region to expire first or cancel it manually, then add your new payment method UK region, and purchase a new subscription using the new payment method currency.
Also, according to the official Microsoft website: https://support.microsoft.com/account-billing/how-to-change-your-microsoft-account-name-or-address-917b1d70-5915-d04e-243a-a618f96ef1d5
"If you change your billing address, it will only be applied to new purchases. Any purchase in the past or any current active subscription will continue to display the previous billing address. If you need to change the billing address for an active subscription, you'll need to first cancel the subscription, change your billing address, and then repurchase the subscription."
Thank you for your kindness and understanding! Please feel free to let me know if you need anything else.
Best regards,
Darhyl