If you are looking to cancel your subscription altogether, you’ll want to check out this support article:
https://help.woobox.com/2018/02/26/change-plan-level-to-free-cancel-subscription
There is currently no option to downgrade a subscription to a lower plan level in your dashboard.
If you would like to switch to a lower plan level, please contact us at support@woobox.com or call us at (360) 450-5200.