If it isn't iCloud Storage, is it some other type of subscription? More information would help.
Purchases - View, change, or cancel your subscriptions
If it isn't iCloud Storage, is it some other type of subscription? More information would help.
Purchases - View, change, or cancel your subscriptions
Backups are free to do. If you mean downgrade your iCloud storage : Downgrade your iCloud storage - Apple Support
how to cancel payment for backups?