Hello kartikeya Reddy manda,
For queries related to payment create a service request they will contact you via email or call to resolve it. below are the steps.
Click the below click for Help + Support -> Create a Support Request
https://portal.azure.com/?#blade/Microsoft_Azure_Support/HelpAndSupportBlade
Type billing.
In Contact Support, create support request
Fill in Problem description.
Click Next button in Recommended Solution
In Additional details add your problem description and in File Upload containing the detailed screenshot of the error you are facing.
In Preference contact method select either Email or Phone.
Click Review+Create and click Create button
Your support ticket will be created and a mail will be sent.
You can track the support ticket in Azure portal using Help + Support, Recent Support tickets
Let me know if you have further questions we would be happy to help you!!