Hi @FABIO MUNIZ ,
please take a look here: Reactivate a disabled Azure subscription
If you are not able to reactivate the Subscription as mentioned another option is to open a support request with Azure Support:
Create an Azure support request
Azure Billing and Subscription support is offered by Microsoft by no cost and it's for free.
Source: Azure Support plans
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten