If the domain shows Renewal Date and Next Billing, with cancel to the right of Next Billing, that means the domain is set to auto-renew.
If the domain shows Expiration Date instead of Renewal date, shows renew to the right of Expiration Date, and does not show the Next Billing line at all, it means the domain is set to expire.
If the domain's renewal has been billed, but the domain's renewal date has not arrived yet, the customer will not be able to cancel the domain's renewal themselves, and the cancel/renew link will not appear. Only the green paid icon will appear.
If you do not want this domain to renew, please get in touch with us and we can cancel the renewal and refund the billing. Just login to your iwantmyname account and send us an authenticated request via our support form.