Post-victory Zeta Pack

Hi, I beat the LS Forge today and after going back to lobby got a pop up about a special "Post-Malak" pack with Zeta and Omega materials that I can buy. I closed to game to check if my "game" Visa had the funds and when I logged back in the pack was nowhere to be found. Was it a one time offer and I missed it by closing the game or is it hidden somewhere?