I never did

exclamation1

1. •
   (old-fashioned) An exclamation of great surprise.

   • 185?, Charles Dickens, Little Dorrit ‘Why, good gracious, Amy, what ever brought you here?’ ‘I wanted to see you, Fanny dear; and as I am going out all day to-morrow, and knew you might be engaged all day to-day, I thought—’ ‘But the idea, Amy, of you coming behind! I never did!’