I placed an order on December 2 for a custom remote from Xbox labs, I got updated shipping...

It may take 1-2 days to actually get to you once it's been shipped, but it takes longer than that to actually create the controller. This is listed on the screen before you complete your order:

Due to the customized nature of Xbox Design Lab, you cannot cancel or modify your order once it is placed. Your Xbox Design Lab order will deliver in 2 to 3 weeks.
You will be charged immediately, and the order cannot be returned or refunded.

Hello Sarah V, my name is Oskayra, and I will be happy to help you.

Beforehand, it is important that you keep in mind that this is a public community forum, so we are players like you, we are not employees of Microsoft or Xbox, so we do not have access to any user account or check anything from the forum. All users help each other with common problems.

Note: This is a public forum therefore, I suggest you not share your personal information.

I am very sorry for the problem you are going through. For this type of case I suggest you request a REFUND for this, there is a form, which is as follows:

https://support.xbox.com/forms/request-a-refund

There you will have to fill out the form with some information that will be requested and you should know that in case the refund request is rejected, you will have to respond to the email they sent you explaining the reason for your refund so that the team in charge can review the request again.

You should also know that game refunds must be made before 14 days have passed since the game was purchased and the game has not been played for a long time, that is, considerable hours of play have not been accumulated. Otherwise, if these prerequisites are not met, the game cannot be refunded.

Subscriptions can be refunded within 30 days of purchase.

Sincerely,
Oskayra.

Before you check out with design lab it actually states this in the cart:

Due to the customized nature of Xbox Design Lab, you cannot cancel or modify your order once it is placed. Your Xbox Design Lab order will deliver in 2 to 3 weeks.
You will be charged immediately, and the order cannot be returned or refunded.

I ordered it from the Xbox design lab and it was delivered December 30 but I don't have the box it came in anymore.

The design lab offer ended on December 17. Since you placed the order after the offer ended, it is not eligible.