I'd leave him completely alone for at least a full week with no handling before attempting to feed him again.

Young Balls can get stressed easily and quite often they won't eat when they're stressed. You've only had him for 3 days and have already moved him around and handled him quite often during that time, so you can plainly see why he might be a little stressed right now. In addition, many snakes will not eat while in shed.

Give him some time in a proper environment and he'll come around. Don't be discouraged if he doesn't eat again, just keep trying once a week with the same type of prey item that he was eating before.

Good luck.