Re-using deleting username

@ComcastJonathan 

I had two accounts that I had merged together. I ended up creating a third profile to create as the main account and deleted the two previous profiles. However, I am now trying to change the third username back to one of the usernames that was deleted (it's a user name that I commonly use). Unfortuantely, when I go to use this username it says it is not available. Is there a way for me to change my username back to this?

Thank you,