I recently closed a 123 survey and thought I had copied all the data to a new feature layer, however it looks like it is not there. In ArcOnline it says Feature Layer, rather Feature Layer (Hosted). The original data is deleted, and from reading around I guess it might not be possible to retrieve that?
But I was wondering, if not possible to retrieve, can I republish the survey and get everyone to resend the data from their mobile devices?
Unfortunately, you can't have people resubmit after republishing the survey because it will be a different feature layer and item ID. If the data is still on the devices, your best bet would be to extract the data manually.
This post might help get you started...