on the contrary
US /ɑn ðə ˈkɑntreri/
UK /ɑn ðə ˈkɑntreri/

1.
al contrario, anzi
used to intensify a denial of what has just been implied or stated by suggesting that the opposite is the case
:
•
“You didn’t like the movie, did you?” “On the contrary, I loved it!”
“Non ti è piaciuto il film, vero?” “Al contrario, l’ho adorato!”
•
Some people think he’s arrogant, but on the contrary, he’s very humble.
Alcune persone pensano che sia arrogante, ma al contrario, è molto umile.