-When creep heard about police he slipped away from there ..and during the phone call he wasn't there...for sure he has told the kidnappers to let arniie talk to the family so none suspects...
But it doesn't make sense, why would the guy, who Khushi revealed as Aman, call Khushi to let her know that Arnav did not reach London and then as soon as the rest of the family knew, he makes Arnav call his family to reassure them that all is right - at gun point ?? ...