Once an order is placed we are no longer able to edit or cancel it. We have this written in our store policy which we hope that you read before checkout.
The reason for this is not because we are unreasonable, it's because we often times ship your products out really fast and therefore are not able to edit order information anymore. Even if you contact use right after placing the order, we cannot guarantee that we'll read your message fast enough.
You're able to contact the carrier directly to change your shipping address information.