Huh, Facebook replied to the appeal:
Hi,
We have received your request for appeal for your app szolnokzene (AppId: xxxxxxxxxxxxxxx). Your app has been restored due to the sufficient information you provided for us to be able to review y…
I haven't found a solution... I expected OneAll to give advice, as the app is written by them.
I will try to appeal through developers.facebook.com but my hopes are low.