Change address

It is ridiculously difficult to change my address on apple.

👉 Sign in to your Apple ID account page and edit / update your Apple ID details.

https://appleid.apple.com

edit your billing addres.

👉 OR To change the billing address you can do (macOS & Windows OS) via iTunes

Start Music -> Click on iTunes -> side bar click iTunes Store -> go to Account (top bar) -> View Account -> Sign in -> Apple ID Summary -> Billing Address -> Edit.

👉 OR (iPhone & iPad) Go to -> Settings -> tap your Profile -> Payment and shipping -> Change Address.

Edit the Address -> tap Done.

So, I am cancelling my subscription.

Read carefully this Apple article: Downgrade or cancel your iCloud+ plan

Downgrade or cancel your iCloud+ plan - Apple Support (PH)

⤵️

Before you downgrade or cancel your iCloud+ plan, first download or remove content that exceeds your new storage amount. To make sure you don't lose any information, learn how to copy what you store in iCloud.

If you downgrade or cancel your iCloud+ plan, the change takes effect after your current subscription billing period ends.

The iCloud + subscription will be terminated depending on the start date.

If you start on August 1 and are going to cancel now, the subscription will stop on November 1, a monthly term is used.

👉 What happens when you downgrade or cancel iCloud+

• If your iCloud storage exceeds your new storage plan capacity, iCloud won't sync or update your information. iCloud updates again when you increase your storage capacity or delete information to make more space. 
• If you downgrade to the free iCloud plan, you will no longer have access to iCloud+ features like Hide My Email, Private Relay, and HomeKit Secure Video support.2
• If you pay for both Apple One and an iCloud+ plan, you can downgrade or cancel the iCloud+ plan and just use the iCloud+ plan included in Apple One.