Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
What exactly does the subscription show under the Services page right now?
If this subscription was purchased directly from Microsoft, first check it here: https://account.microsoft.com/services
Find the Microsoft 365 subscription and see whether it shows "Past due" or gives you an option such as "Pay now," "Retry payment," or "Change how you pay."
When you changed the payment method, does the new card now appear as the payment method for this specific Microsoft 365 subscription?
Click "Add comment" to let me know.
Thanks!