REQ PACK PROMOTIONAL, Where is it?

I bought Halo: Last Light and two more Promotional REQ packs from the Vids of Halo 5, i redeem them at Microsoft as Codes, but i do not see them, i only have a download in Halo 5, says “Promotional REQ Packs”, (9.89 mb), still it can not be used, you know where i can open them? (too it does not show in Halo 5, Req Openings)

help </3