Okay. This is all super normal.
I would forget about the flakes. They muck up the water and clowns don't go to the surface for food.
The clowns need a little time to get used to their new home. What I did was pinch some pellets between my fingers and dip them into the tank water. When they smell the bit that starts to dissolve, they should come your way. Clownfish aren't geniuses, and I had the best luck dropping one or two pellets at a time right in front of their faces, and they would still miss them sometimes.
They just need 3-4 bites each.
If they are spitting the pellets out, they're likely too big. I bought mini pellets that work much better for little fish mouths.
Lastly, pick up some frozen mysis and offer that as well.
I wouldn't worry if they don't eat the first day or two. Keep an eye on them, and watch for spots, milky bodies, rubbing against rocks, or other signs of disease. And don't be surprised if they fall in love with a different corner in a few days.