I can’t change my region, cuz of apple music subscription

See -> Change your Apple ID country or region

Change your Apple ID country or region - Apple Support (KW)

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What to do before you change your country or region

• Spend any balance remaining on your Apple ID. If you're not sure whether you have a balance, check your Apple Account balance.
• Cancel your subscriptions and wait until the end of the subscription period. 
• Wait for any memberships, pre-orders, movie rentals, or Season Passes to complete, and wait for any pending store credit refunds to process. You can cancel a pre-order.
• Make sure that you have a payment method for your new country or region. See what payment methods you can use.
• Redownload your apps, music, movies, TV shows, and books on any devices that you might use to play or read them in the future. Some types of content might not be available in your new country or region. Learn what types of content and services are available in your new country or region.

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See -> Check your Apple ID balance

Check your Apple ID balance – Apple Support (UK)

1.

If your balance is less than the cost of a single item, contact Apple Support directly, they will help you clear your balance: Get Support

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If you have Apple ID balance you can't use.

You can't redeem or return Apple Gift Cards, App Store & iTunes Gift Cards or unused Apple ID balance for cash, except as required by law. If your jurisdiction allows the refund of redeemed gift balances, you can contact Apple Support to request a refund. 

When you contact Apple, include the following information:

•           Your Apple ID.

•           The refund amount.

•           Your current delivery address.

Cancel the subscription -> If you want to cancel a subscription from Apple

If you want to cancel a subscription from Apple - Apple Support

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Can’t find the subscription that you want to cancel?

You can cancel iCloud+ in your iCloud storage settings.

If you aren't trying to cancel iCloud+, find your receipt:

1. Search your email for the words "receipt from Apple."
2. On the receipt for the subscription, check which Apple ID was used.

• If a family member's Apple ID appears on the receipt, ask that family member to use the steps in this article to cancel the subscription. You can’t cancel a family member's subscription.
• If another Apple ID that you use appears on the receipt, sign in with that Apple ID and use the steps in this article to cancel the subscription.
• If you can't find a receipt from Apple for the subscription, you might have bought the subscription from another company. To find out which company bills you, check your bank or credit card statement. To cancel the subscription, you must contact the company that bills you for the subscription.

Click here for more support and assistance.

Contact iTunes Support for assistance. See the Apple Support articles below for contact information.   

iTunes Support – world wide   -

Apple Support schedule phone call     -

Billings and Subscriptions   -

Apple on Twitter

Messages chat with Apple