Hello ros02,
Thank you for using Apple Support Communities.
We understand that you ordered a MacBook Air and the original delivery date was Dec 2, but it has since updated with an estimated deliver date of Jan 7 - 14. We do not have access to your account information to assist with your issue. We would recommend you take a look at the following support article too contact Apple Support for assistance with your order:
Contacting Apple
Specifically:
Apple.com is a convenient place to purchase Apple products and accessories from Apple and other manufacturers. You can buy online or call (800) MY–APPLE (800–692–7753).
You can get information about an order you placed on the Apple Online Store through the Order Statuspage. If you prefer, you can also get order status or make changes by phone at (800) 692–7753."
Best regards.