Only subscription administrators are able to restore expired channels.
To restore a channel or change a channels expiry date, first navigate to Options > Manage Channels:
Restoring a Channel
Click on the restore icon for the channel you wish to restore.
Then, a prompt will appear asking you to set a new expiry date for the channel.
After setting a new expiry date, click Restore.
A confirmation prompt will appear shortly.
Changing a Channel Expiry Date
Click the calendar icon to update a channel's expiry date.
Then, click on the calendar icon in the prompt that appears and select a new expiry date.
Click the Set New Date button to confirm your changes.