You can reactivate a canceled subscription by following these three easy steps: 

1. Log in to your RSS.com account

2. Navigate to and select "Subscriptions" 

3. Next, click on the "Reactivate" button (see below screenshot)

Important:

it is possible to reactivate the subscription before the end of the current billing cycle when the status is CANCELED. Please check the message displayed in the message under the "Reactivate" button to show how many days is still available to restore your podcast subscription. If your subscription status is DELETED is not possible to restore your podcast. In this case please open a support ticket [1].

[1] Extra fee may be required to restore a deleted podcast depending on the podcast status.