Betrayed (6-7)
(Other definitions for double-crossed that I've seen before include "Cheated by one's own agent" , "Deceived" .)
(Other definitions for shopped that I've seen before include "Bought goods or gave away information about someone" , "Bought goods or slangily informed on" .)
(Other definitions for undone that I've seen before include "Not finished; untied" , "Annulled; untied" , "Brought to ruin or destruction - or not buttoned" , "Ruined; not tied" , "Brought to ruin or buttons not fastened" .)