Call SIG, they'll send you a return ticket for your gun and they'll make it right for you.
I recently had issues with a new SIG Traditional Compact but they took care of everything in very short order. My experience with their customer service was great.
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper