Put it immediately after the false statement in your edit, so the denial answers the claim directly. Lead in with No No Wait Wait when you need to stop the speaker first, then let this clip deliver the correction. Follow it with Wrong Answer Game Show to underline that the statement was incorrect and keep the sequence moving.
O tym dźwięku
This is a short spoken clip, just over a second long, of a voice firmly saying That's not true. The delivery is direct and dismissive, with no music or extra effects behind the words. It feels like an instant correction, firm and a little exasperated, the kind of denial that lands because it is so plain and unmistakable.