Characters from Halo Reach

Hello, I have a problem, I hope you can help me. On Tuesday I registered a Game Pass Ultimate card to obtain the characters Kat and Emile from Halo Reach, they did not give me install the game from the Ultimate version and they have not given me, they do not appear in add-ons. Thank you.

Please send a ticket in to Support.GearsOfWar.com and/or https://support.xbox.com/contact-us