My original account "bustaballs" has had the password changed and is no longer associated with my email address. Who do I speak with regarding this matter?
Have you tried using the password reminder?
https://bitcointalk.org/index.php?action=reminderHave you tried checking your spam folder of your email account as well?
If you have done those 2 actions, then the only way left is given already by grue and jackjack.