I am serious; this isn't a sarcastic comment. You just bought it, its brand new, you are allowed to return it for a refund. How many hundreds of dollars did you pay for it? Why should you now try to fix this? They messed up in designing it and now it has a problem, one you as a customer shouldn't have to deal with. Not with how much 27" monitors cost.
I agree with your principle here. But backlight bleed is just a part of LCD technology.
If it is the sort of horrible bright white bleed just glaring out of one of the corners, that may be defective. But, if it is the general glow uniform across the screen on a black background, well that is just a part of owning an LCD.
It would be awesome if they made 2560x1600 30" Plasma computer monitors
Plasmas do still exhibit some image retention but it is much better than when the tech was new. The smoothness of motion and deepness of blacks on a plasma is leagues ahead of where LCDs are at.