If you accidentally canceled your subscription this month and would like to reactivate it, you can do so by clicking My Account > Account Overview from the top menu bar of your account. Then, on your Account Overview page, locate your subscription and click "Reactivate".
If it's been more than a month since your subscription was canceled, you will need to create a new subscription using your existing account (same email and password). To resubscribe, click The Box on the top menu bar of your account, then click the subscription you would like to join: Base, Premium, or Luxe. On the subscription page, click the "Join" button and follow the steps until your subscription is confirmed.