I'm so sorry!
We have silkies hatching here every 5 days, and they're always fine, but shipped chicks have it rougher.
Usually giving them electrolytes or probiotic/electrolyte powder in their water there first day can help them deal with the stress. We've got Hydro-Hen here, but there are many powders for their water.
Do you have a thermometer you can put on the floor of their brooder? They should be at 95°F for their first week, then down by 5 degrees each week. They need one end of their brooder to be room temperature, where the food/water goes, so they learn to go there if they get too warm.
Check for pasty butt. That's usually very obvious when poop sticks and dries to their vents. You'd just soak their butt in a little warm water to soften/loosen it, then wipe it with a paper towel. You can put a little dab of vaseline or coconut or olive oil on their vents to try prevent it happening again.
They should be on only chick starter crumbles and nothing else for their first month to six weeks. Silkies can suffer from vitamin deficiencies and having other stuff not as nutritious can harm them. I use a little shallow container (plastic peanut butter jar lid) put crumbles in it, then wet them good. They should get excited over that. It's good for them to eat more and it's got hydration too.
I sure hope they start getting stronger and growing well for you!