Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
I understand your concern, especially since you already paid for the annual subscription in September.
Please sign in to your Services & subscriptions page and check whether two subscriptions are listed or whether recurring billing is enabled for December 1. You can also review your order history to compare the September payment with the upcoming charge.
If the December charge appears incorrect, please contact Microsoft Support for further assistance. Billing Support can securely review the account and correct any duplicate billing. Please do not post payment or account details in this public forum.
Please note that this is a user-to-user support forum. Moderators and contributors cannot access accounts or Microsoft’s back-end systems. We can only provide technical guidance on reported incidents, requests and ideas
Thank you for your understanding and time