Halo waypoint won't recognize me

So i changed my gamertag a while back…And i’ve recently gotten back ito halo because of the obvious. When i sign into waypoint it brings up my current GT with no service history but i have screenshots when my name was still A CollegeKid 8D. A CollegeKid 8D the profile is still viewable. Can i link these or is there anyway to get the service record ported over? please help, i love halo:)

edit: last time i tried to play halo reach with my new gamertag it wouldnt let me at all go into matchmaking, i had to play as a guest. bah humbug, please help.