First, AMEX may not reverse the charge. They need to investigate your claim, and make a decision. Of course, they may agree with you. Midway putting you in collections is not the best outcome for your credit rating. Personally, I don't have a lot of sympathy. They were used sites when you put them on your gun. As far as them being broken, perhaps they were damages during either install or uninstall. You say that they didn't work right. Perhaps they were defective, but putting them on the gun, and leaving them on for 2 weeks, after you found that they were defective, then send them back without original packing, I can understand why they would consider them broken. As far as them honoring the original agreement to accept the terms, if the sites were damaged (which could have been from the factory), then I understand why they would change their minds. Sorry about the problem, but at this point, you would be better off paying and learning a few lessons: 1) Hold on to the original packing for at least several weeks, in case of return. 2) If there is a problem found after install, then uninstall them, put them back in the original packaging, and contact them for authorization for a return of defective merchandise.