We'd hate to see you go, but if you must leave, then you can leave at anytime under no obligations. You may be prorated for the remainder of your subscription.
If you’re cancelling your Website Management subscription, you will be responsible for finding a new hosting provider and that new provider will have to migrate your website to their servers for you (most of them do it for free). You will also be responsible for all other costs associated with your website, including licenses and domain registration.