Hi Eduardo Ovalle,
Thanks for reaching out to Microsoft Q&A.
try if you could see anything you are looking for in the following link
if nothing works, you can go ahead and create a support ticket using the following link. Azure support for billing related queries is free, you are not required to have a valid support plan for this.
https://go.microsoft.com/fwlink/?linkid=2083458
Please 'Upvote'(Thumbs-up) and 'Accept' as answer if the reply was helpful. This will be benefitting other community members who face the same issue.