I paid for my subscription but got canceled anyway.

If the subscription was paid but apps show it as canceled, check these items:

1. Go to Services & subscriptions and confirm the subscription is active and shows the correct end date.
2. Make sure the apps are signed in with the same Microsoft account that was used to purchase the subscription.
3. In Word or Excel, go to File > Account and use Update License, then sign in again.
4. If the subscription was recently changed from one plan to another, such as Microsoft 365 Family to Microsoft 365 Personal, the previous plan can show as canceled as part of the switch.
5. If the charge still appears wrong or the subscription status is incorrect, use the Manage your payments page to investigate the charge.
6. If needed, contact support through Contact Microsoft Support.

If Turn on recurring billing appears instead of Manage, the subscription is already set to expire on the shown date and there should be no further automatic charge.

References:

• How to get a refund on a Microsoft subscription
• Unable to cancel your Microsoft subscription
• When opening Word or Excel, getting a 'subscription canceled' message but I have renewed my Office subscription - Microsoft Q&A
• you cancelled my subscription for no reason - Microsoft Q&A