Can't find my free 400 energy splinters

Hello, this is my third day playing and I read you get 400 free energy splinters the second day you login, but I've opened all the chests and I have 27 energy splinters, I have uncapped only Invisible Woman (I've checked every single hero) and I'm using the free team up. So my question is, do I have to pick up the 400 es somewhere?
Thanks