Need to manually terminate active Apple Music subscription to change Apple ID region

If you have already cancelled a subscription then in most countries canceled subscriptions will continue to run until the expiration date. To have one end before that date you need to contact Apple and explain you need it to end immediately. Note that “In Germany, Israel, South Africa, and Turkey, you can cancel a subscription made through the iTunes Store or the App Store with immediate effect." - About canceling subscriptions in Germany, Israel, South Africa, or Türkiye - Apple Support

To make a request of Apple click here --> https://getsupport.apple.com/?caller=kbase&PGF=PGF63006&category_id=SC0060&symptom_id=23208 and try to get a live representative,

or,

https://getsupport.apple.com/solutions Enter “Cancel subscription” in the search feature, enter, then on the next page scroll down to the chat or phone call option.

or:

Use this link to contact Apple for support and service --> Contact Apple Support - Apple Support Scroll down to the bottom to find a telephone number. If your country is not listed then you will have to see if there is a chat option using one of the methods above. If no support options are available you may have to create a new account for your new country (avoid this if at all possible) or just wait for the subscription to end naturally.

Thank you for reaching out. 🤗

There are many parameters that need to be taken before changing regions because currency valuation is not the same across various regions.

If you are changing regions:

• Spend any remaining Apple Account balance: You can spend your remaining balance on the App Store, other Apple services or in some countries and regions, Apple products and accessories. If you’re not sure if you have a balance, check your Apple Account balance.
• Clear a low Apple Account balance: If your balance is less than the cost of a single item in the App Store or other Apple services, learn how to clear your balance.
• Cancel subscriptions that block a country or region change: Cancel any subscriptions that block a country or region change, then wait until the end of the subscription period. 
• Wait for pending activity to clear: Wait for any memberships, pre-orders, movie rentals or Season Passes to complete. You can cancel a pre-order. Also wait for any pending refunds from Apple to process.
• Check your Family Sharing status: If you’re a part of a Family Sharing group, you might not be able to change your country or region. Learn how to leave a Family Sharing group.
• Have a valid payment method ready: You might need to enter a valid payment method for your new country or region. If you don’t want to enter a payment method, wait until you're physically in your new country or region. Then create a new Apple Account.
• Redownload your content: Some types of content might not be available in your new country or region. Redownload your apps, music, movies, TV shows and books on any devices that you might use to play or read them in the future.
• If you need to empty your balance: Contact Apple Support to request a reset of your account balance to zero.

For full details, learn how to → Change Regions for step-by-step instructions.

Good luck! 👋🏼😉

Smiliñ 😎 Brian | Community Volunteer