i agree, no attempt at going for goal (presume kick at goal had been signalled and defending side switched off).
scrum back where the kick took place? that would be my guess if i had to make the call in real time, now to check the good book.
Helpfully its under Law 8 Scoring rather than Law 20 Penalty Kicks?
Since there is no sanction for 8.20, I assume we keep reading until we get to one, which is the scrum mentioned under 8.21
[LAWS]
20. If the team indicates to the referee the intention to kick at goal, they must kick at goal. The intention to kick can be communicated to the referee or signalled by the arrival of the kicking tee or sand, or when the player makes a mark on the ground.
21. The kick must be taken within 60 seconds (playing time) from the time the team indicated their intention to do so, even if the ball rolls over and has to be placed again. Sanction : Kick is disallowed and a scrum is awarded.[/LAWS]