To resubscribe to Refreshments, head back to the Refreshments page via the top menu bar of your account and click the SUBSCRIBE button beneath each of the products you want to receive. This will automatically reinstate your membership.
To edit your address or payment details, click My Account > Account Overview on the top menu bar, then scroll down to your Refreshments membership and click Manage. As a reminder, Refreshments is a totally separate membership from BoxyCharm, and any changes to one membership will not affect the other.