I've had a few people ask for me to show a video doing the messy buns or other things. If you look to the right at the list "labels" & click on tutorials, it will show you all of the videos I have done so far, which has the messy buns on it.
So for today - here's what we came up with:

The part is a little different from what I normally would do. Instead of a zig-zag part, make it look like boxes. Pull into pigtails.

Tuck under the pigtails, going the opposite way that you normally would, so the hair sits on top of the knot.

Then start pinning the pigtails under so you don't see any of the ends.

Spread the hair with your fingers & spray to hold.