Unfortunately, we don’t have the ability to restore operatives currently due to limitations in our backend. This is something our developers are aware of and are working on.
Though, what I can do for you is level up a new Veteran, however this would be without any previous equipment as once it’s deleted we’re unable to retrieve this data.
If this is of interest to you, please create a new Veteran character and proceed to the Mourningstar hub. Once done, please let me know and I can do the rest from there!