Hi @Joseph sanchez, and thanks for posting here.
I’m afraid that, if the Dropbox account in question has been deleted, it’s not possible to restore it, or any files that were previously saved on it.
The only thing you can perhaps double check, if you previously had the desktop app installed on your device, is whether there’s still your old Dropbox folder with your files within, so that you can transfer them to another location.
Hope this helps a bit.