I’m trying to change my ICloud region

You will have to contact the official Apple Support about that by using the blue link below:

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• If you still can't change your country or region, or you have less store credit than the cost of a single item, contact Apple Support.

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copied from: Change your Apple ID country or region - Apple Support

Buy something more expensive than your balance and use a different payment method from the current region for the extra amount; if you can't, click here and ask the iTunes Store staff to zero it.

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