My account has been disabled
I stopped payment for additional iCloud storage now my account is disabled.
iPhone 8 Plus
I stopped payment for additional iCloud storage now my account is disabled.
iPhone 8 Plus
Instead of stopping payment, I would have simply downgraded to the free iCloud Storage plan:
Downgrade your iCloud storage - Apple Support
However, now I think you are going to have to resolve this directly with Apple (see If your Apple ID is locked or disabled - Apple Support):
My account has been disabled