Wow, made a mistake and then gave pitiful customer service. He's not going to keep his customers for long doing business like that. It's hard to believe he put that backing on sideways. The design on the fabric is pretty obvious as far as which way it's supposed to set.
It's a beautiful quilt regardless though! Peyton will love it and won't think twice about the mistakes that you see. She's going to be way to busy looking at all those cute charm squares! Great job!