You need to  make what I call a "safe place" room, before you bring your kitten home.

Make this a small room, with a type of "safe" box that kitty can hide in, on or behind, a water bowl and litter box in plain view.

Go straight to the "safe room" when you bring kitty home.  Don't give him/her any chance to run away and hide before you put kitty in this room.

Take a bowl of food into this room 2-3 times a day.  You will be the provider and your kitten will learn to trust you through food.

Don't give your kitten free access to any other rooms for at least one week or until the kitten comes to you.  Then you can allow kitty to wonder around one room at a time, but only with strick supervision.

When you are unable to keep an eye on your kitty or will not be home, you must return him/her to their "safe room".  You will know when you will be able to trust kitty to rome the house when you are not home.

SHOPE KEEPER