Can´t use the online service to send you my Elite Controller

You'll want to contact support and they should help you get it set up.
http://support.xbox.com/contact-us

Check out the Servicing your Xbox Elite Wireless Controller page which you can find here:

support.xbox.com/.../servicing-elite-controller. You'll most likely have to use the Xbox Online Service Center to try and get your replacement.

Hello

It's best that you send in your controller for repair, you can do this by following the steps on this support page

support.xbox.com/.../servicing-elite-controller

You would need to try contacting support to see if there is anything they can do, but it is noted that when you send an elite controller in you should only send the controller. Nothing else is guaranteed to come back. http://support.xbox.com/contact-us

https://support.xbox.com/en-US/xbox-one/accessories/servicing-elite-controller_OLD

Important If you do need to send your Xbox Elite Wireless Controller to our service center, do not send removable parts with your controller. They will not be returned to you. Keep all
the removable D-pads, paddles, and thumb sticks. You'll receive a replacement controller without these parts, so you'll need to use those original parts with the replacement controller.

@CrispmetalcM: You can probably check here to see warranty info
support.xbox.com/.../warranty-and-registration-faq and I cannot find a way to extend a warranty online? I have no device registered by Xbox yet.

support.xbox.com/.../servicing-elite-controller is more help too for the future about servicing the Elite controller.