You can cancel your Jobulator service at any time by going to Jobulator.com. To sign into the My Account portion of the Jobulator website, enter the email address you gave during the sign up process and your PIN.
If you are wanting to cancel your subscription, click the Change Plan/Payment Info link. You would then click the Cancel button and would be brought to the "Cancel Subscription" page, where you would confirm that you want to cancel by clicking Cancel.
If you see the Renew Now link, your account is already Inactive. You can read more about renewing in "Cancelling Your Subscription."