I would be surprised if once they have the pieces in hand and see what you have they don’t expedite your handgun repair.
Write a nice detailed letter explaining your dissatisfaction with your purchase and let them know the outdoor range season is coming to a close rapidly. Put the letter in with the handgun. Give them some time to make it right, if they fail time wise to get the pistol back to you then call and talk to a supervisor. I understand your frustration but stuff happens, give S&W an opportunity to make it right, I’ll bet they do.