Log in to self-serve, go to the Plan and Add-ons tab and click into My Add-ons page. Scroll down and you'll see columns of Add-on choices. Click the + next to the Add-ons you want (you'll be able to see the quantity you're purchasing), and click the ...
Since you can't change your community username by yourself, try sending a private message to the moderator team and ask them if they can change it for you. Include your account number or phone number to help speed up the identification process. Click...
