To increase the number of O365 Licenses in your control panel you need to login to your control panel: https://controlpanel.gradwellcloud.com
Once you have logged in and selected the Microsoft Subscription in your control panel. Select the Microsoft Office 365 button at the top of the page.
This will take you to the main Office 365 configuration page within the Gradwell Control Panel. If you then select the 'Licenses' button from the sub menu, this will take you to the page where by you can manage your licenses.
On this page you will get a list of your Licenses against each product type. As you can see on my account I currently have 1 Office 365 Business Premium License. I want to increase this to 2 so I select 'Adjust Limit'.
This opens up a pop up box which allows me to set a 'New Limit', please be advised that this will be the total number of licenses you want, not how many you wish to add. As such I have 1 and would like to add 1 more, this makes my 'New Limit' 2. Once selected, click the 'Adjust' button at the bottom.