I bought my note 7 out right at Walmart. The first recall happened and Walmart said I had to go through at&t to get it replaced. At&t replaced it on Sept 20 so the replaced phone has a different imei than the original. I went to return it for a refund at at&t after the second recall and they said I had to go to Walmart to get my money back. I paid out of pocket for this device and now they say all I can do is exchange it for a different device. I would have kept the note 7 had it not been recalled. I don't want an exchange because I have a nexus 6p. What can I do to get my money back?