In order to reactivate your membership just log in to urbansportsclub.com using your old password and email address. From there you can click on "reactivate membership" and choose your new start date and membership plan. If you used to be a corporate member you can choose to either keep your old conditions or reactivate without your company discount.
If you have a promo code you can enter it in the last step of reactivation in the summary box: