Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Log into your Microsoft account on this link and check if the Microsoft 365 subscription has been re-enabled by that payment that was deducted form your account.
https://account.microsoft.com/services/
If so, cancel the subscription again and ensure you disable the recurring billing on the subscription, you should then get a pro-rata refund within 5 business days.
If that process is not successful for you, this forum is just a user to user forum, no-one here has any account access, you will need to contact Microsoft Support directly, try using this method to contact their support.
Go to this link: https://support.microsoft.com/contactus
Select Microsoft 365
Click 'Get Home Support'.
In the box provided, type billing.
Press Enter, then on the next page, scroll down and click 'Sign in to Contact Support'.
Navigate to Microsoft 365 and Office - Manage my Subscription.
Select the 'Chat with support agent in web browser' option