Revive my expired education plan


My name is Yeseok Jeon and I’m an assistant professor at Ulsan National Institute of Science and Technology (UNIST).
My github account is jys0710 (email: or
I also lead S2 research group. However, yesterday, our research lab’s GitHub repository (S2-Lab · GitHub) education supporting (team level service) is expired.
Although I tried to revive it, I cannot find any related options.
For example, if I try to revive our git repo through “github-org-upgrades” page, this page just said that “coupon already applied”.

If you don’t mind, could you please help me to address this issue?