Delete the buildings from the game all together. You can fix you got lucky mission or update it in the code for more xp a run. Then just simply delete the building.
Now with that said. Theres a trainer problem. I need to level toons. Almost 24 hours now into level up event and i am still waiting for the $25 usd offer for trainers. Whays the deal scopeplay. You trying to get rid of players and spenders too?
Fix something. And fix it right now ! Im growing old