Either way, he still appears to be the master user of your Team Account. He was last seen on March 8th, so he is still relatively active, too.
If you're still in contact with him, I suggest you ask him to add you to the team account by following this link and adding your user.
If your not on good terms with him, or if there are any other problems, reply again and we'll see what we can do.
Edit: Was he actually a member of your clan at any point?