Many players are having a hard time redeeming your Call of Duty: Black Ops III beta code and teams at Microsoft and Activision are working on fixing the issues.
Right now the fix seems to in the hands of Microsoft. XBox Support and Activison have both shared through Twitter the following:
We're aware of the issues you might be seeing with your Black Ops 3 beta codes. We're looking into it now: http://t.co/PzAdjUFMJj
— Xbox Support (1-5) (@XboxSupport) August 26, 2015
— Treyarch Studios (@Treyarch) August 26, 2015
Right now some fans are upset but rest assured that the teams at Treyarch and Xbox will take care of the fans at the end.