how do I stop paying for iCloud storage?
I don't want to pay for the extra storage and can't find how to delete further payments. I can't click the payment button off
Cancel upgraded iCloud storage by downgrading to the free 5GB plan. See instructions in the following Apple article: Downgrade or cancel your iCloud+ plan - Apple Support
Also see the following from that support article:
1 - Tap Done. If you can't tap Done, make sure that you're signed in with the same Apple ID that you use for your iCloud+ plan. You can also try following these steps on a different device. If you still need help, contact Apple Support.
If you downgrade or cancel your iCloud+ plan, the change takes effect after your current subscription billing period ends.1