Your workspace has an open unpaid invoice of $5 USD that failed due to insufficient funds. Outstanding invoices must be cleared before you can cancel, so you'll need to update your payment method and pay the open invoice at your billing settings first, then you can cancel from the same page.

The Billing page shows Final Amount Due = $0.00 and says “Your usage is fully covered. No further charges.” However, the AI says I have an unpaid $5 invoice. These two things contradict each other. Could you please check my workspace manually, cancel the subscription from your side, and remove my payment method?

Your workspace does have an open unpaid $5 invoice (the July Hobby plan fee) that declined on July 10 due to insufficient funds. The "$0.00 Final Amount Due" on the billing page refers to your current-period usage estimate, not the outstanding invoice - these are two separate figures. You'll need to update your payment method and settle that open invoice at your billing settings before the cancellation option becomes available. We're unable to cancel subscriptions from our side.