To cancel your Castos subscription plan:
1. Click the account name and select My Account from the menu
2. Select the Billing Info tab
3. Click Cancel Account:
Canceling your subscription will remove all of the media files that you have hosted with Castos as well as remove your Castos based RSS feeds. Doing this without proper backups or an alternative hosting solution will effectively delete your podcast and it WILL NOT be available to your listeners anymore.
This cannot be undone.