without seeing the photo (of how serious the bending is) another word of advice is that if the bent part has streaks of white (which is actually tiny cracks / air spaces), then just bend it back as suggested but dont make it any worse by heating or overbending etc hoping to make the white streaks disappear completely, they wont...they wont melt/fuse together. it better to do a bit at a time if its your first attempt.