The Never Settle: Reloaded promotion has expired. There should be instructions given to you (but not on the coupon-code) to go to the Radeon Rewards Portal.
Try choosing "Never Settle Reloaded" in the drop-down. Perhaps once you submit, an e-mail will be sent to you pointing you to Radeon Rewards.
FYI, Radeon Rewards = www.amd.com/radeonrewards
AMD Customer Care
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