If you would like to upgrade your level of service, simply log in to Seraf, go to Account Management located on the left navigation menu, and scroll to the bottom of the page where you will find the Subscription section.
Here you will see details about your current subscription and an "Upgrade" button. Click on the button, select the new level you would like to subscribe to, and go through the check out process. Any remaining balance you have from your original subscription will be automatically applied as a credit against your new plan.
You can also contact us (email@example.com) with any questions.