Can you straighten a plastic bumper after damage

[Skyedriver]

Hi
Young son's i10
Someone clipped his back bumper (in Lidl, Oban) this afternoon and he's a bit annoyed.
(they left a note, looks like an old persons wobbly handwriting).

Anyway, couple of paint chips which I can touch in happily but the bumper is slightly distorted (see photos).
I'm guessing I can straighten this with a little bit of warmth? Not blow torch temp obviously. Boiling water?

Any suggestions please, could go to the professionals but would rather save the aggro.
Thanks