Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
It is impossible for me to cancel the subscription and set it up from Argentina since it does not appear anywhere, and the charges are made month by month. I understand this is because I now reside in another country, but my account remains the same. How can I resolve this, or through which other channel can I contact to get a solution?
I believe you will have to contact Microsoft support via https://support.microsoft.com/contactus.
If you are prompted to sign in, you should be able to make use of another account to get access.