I completed the 7th level of the Forge Bowl contest but was not awarded my Pillar of Honor. I have since received 2 Pillar upgrades but can't upgrade because I never got the award building from level 7. I've attached the screen shots so you can see my issue. User Kubla001, Brisgard World.
Click on the buildings tab on the top, then as dragon mentioned you will see all buildings in alphabetical order. Find "Pillar of Heroes Lev-1". Place it in city, then go go consumables tab and find the upgrade".
When you are in * (All) tab, first it shows consumables then buildings in alpha order.