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1.Regarding your situation, you can try to process the payment directly in Microsoft 365 admin center:
-Go directly to the Microsoft 365 Admin Center
-Sign in with the Microsoft 365 admin account you originally used
-Once signed in, Click Billing > Your products > Find your suspended “Exchange Online Plan 1” subscription > Click “Reactivate subscription” > Add or select a payment method and complete the payment
As soon as the payment is processed, your email service will be fully restored with all previous emails, contacts, and calendar data intact. Microsoft keeps everything during suspension.
2.If you cannot sign in to the admin center or the “Reactivate” option is not available, please open a support ticket with Microsoft Support
-In Microsoft 365 admin center
-Navigate to Support > Help & Support
-In the description box, enter the issue details
-Choose contact method > Submit the request
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