There is a way to restore. You would restore all files and folders, and the database. What you have done here is restore 50% of the components,w hich would leave your site offline longer to your users.
As its 'unexpected' there would be no way in which to do this. Quite simply, if we knew it was going to happen, it wouldnt happen. As a self hosted customer you would be expected to take care of full backups of your site and restore in full should there be issues.
It does need to be noted here, you were responded to within 30 minutes, and we are trygin to assist you. You havent been left an excessive amount of time here.
As I mentioned above, you need to upload a fresh set of files from your client area. Once you have done this, please visit /admin/upgrade to complete the upgrade procedure. It looks like you are missing something here