Sorry to hear that, hopefully they will take care of you. I hear a lot of good about Sigs but my personal experience has been two different Sigs at two different handgun classes and in both cases, the guns physically broke while we were shooting them. Granted they were both rental guns that I am sure abused and probably not maintained very well.
But I am not in a hurry to buy a Sig.
Good luck, let us know how they treat you.