Disclaimer: This is the forum for pt-br locale. However, I will answer you in English since the post was in English. If you need support using your native language, please let me know.
Hello Cristopher Matos,
Welcome to Microsoft Q&A forum.
I see that you are having issue with a recurring billing even though you have canceled the subscription.
Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas. For more information regarding your account and subscription, please contact Microsoft Support or Xbox Support. Thank you for your understanding.
Regarding your questions on how to check your subscription, you can go to account.microsoft.com/services or log in to the Microsoft website and choose the subscription section. There you will be able to see your subscription status and list of subscription you have. If you want to stop recurring billing for that account, you can check and make sure recurring billing for all subscription has been stopped. Additionally, as I checked, the 12.99 charges don't seem to match the price of the Game Pass Premium.
If you have already stopped all subscription on your account and still get charged, there might be other account that used your card before for subscriptions that that is why they are charging your card. In that case, contacting support could helps.
Feel free to let me know if you have any other questions.