I would not have the other 3 checked. I would go ahead and ditch them and get a whole new and balanced set together. Getting the three you have, plus a new one, could cause balance issues. Sucks to be in the position you're in, but one of two things must've happened here: You made a mistake, or there was a flaw. If there was a flaw in the product, go back to where you got the product from and see if they're willing to take care of you. If you made a mistake, then I guess it just sucks.