I have that hair and just checked. I don't think there is a way to get rid of the bangs.

I do know that when this hair came out the hair was actually a figure and found under "Figures" but it was updated and changed to a hair prop and is now found under "Hair" in the library.

It's quite possible that the promo is an older render of the original hair figure. I am not sure, but it's possible that the morphs were changed slightly when the hair was changed to a prop from a figure.

You can check with Aery_Soul either here in PM or at their website

www.aerysoul.com/board/index.php

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi