Hi Marcos,
The discount should show up in your account 5 business days after the last day of your Virtual Training Days. You can check by attempting to schedule the exam, and when you get to the discounts page, it should show up. Similar to below screenshot:
Please ask your question in the Microsoft Certification forum using link below. There are support moderators over there that will respond to your question in 1 business day and can assist with getting your discount if necessary:
https://trainingsupport.microsoft.com/en-us/newthread?threadtype=Questions&forum=mcp
Please click Accept Answer if above was helpful.
Thanks.
-TP