Restore Deleted files ubuntu one
Solution 1:
Ubuntu One doesn't provide a way to restore your files but if you cantact the team them should be able to restore the files for you https://one.ubuntu.com/help/contact/
Solution 2:
I've had the same problem, but I realized that all the files removed go to the Trash in all the devices that are synchronized, so you just have to recover them from there.
If you can't find your files on the Trash, you can contact Ubuntu One support directly at https://one.ubuntu.com/help/contact/ mentioning which folders you need recovered, and that they are not on your Trash.