WOW.......
Your cage is wayyyyy to big for that little guy.
Ditch it, return whatever you bought for it. Because everything is useless!
Get a 6qt tub, and fix it up that way.
He seems to be really stressed out. Maybe you need to read up on the site a little more. You should have left him alone for a week when u first got him and then feed him. If he doesnt eat again, its okay. Just leave him alone and let him be. He needs to get comfortable in his new home.