HI there Cooldoggie,
I'm sorry to hear Nocturne's running your store. The most common fixes for a blank store is to kick him out and instructions can be found in our KB article:
If you continue to experience problems, or have any trouble running through the guide, I strongly suggest getting in contact with our support team. You can create a support ticket here: https://support.leagueoflegends.com/tickets/new
If you do contact us like this make sure to let us know as much detail as possible as there are several issues that can cause this kind of problem.