I have a couple of ideas that I couldnt see suggested already, and thought i'd save a bit of space by combining them:
Idea 1: If you get a reply to a query on ask an agent, then you could be notified by an email - great - however the email only says your first name, i currently have 3 different accounts and this can be really confusing if you have more than one query on the go. So perhaps just include your username that it appliess to as i never know which account it is reffering to.
Idea 2: A button to order all your SIMs for the month - you know why - it takes ages. (I was supprised not to see this when I searched so i dont hold out much hope for this). So just a button saying 'Order all of my remaining SIMs for the month' or something like that.
EDIT: Included a very quick animation of what the ideas could look like.