Hello @Siva Narayanan Thank you for contacting us through Microsoft Q&A platform. Happy to help!
It looks like your Azure subscription is disabled due to non-payment of old invoice and you are unable to create a support ticket. Since you are unable to create a support request, I suggest you try the following options:
Here is the link - https://docs.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request to create support case.
FYI: Azure Billing and Subscription Management support is included in the Basic Support Plan without any charge.
https://azure.microsoft.com/en-us/support/plans/
Twitter : Connect with @AzureSupport on Twitter for answers, support, and to connect with Azure experts. best place to raise a request
Few Customers are using the Microsoft REST api Support Tickets - REST API (Azure Support) | Microsoft Learn to create Support request.
OR
You can call global customer service - https://support.microsoft.com/en-gb/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2 to raise a support request on your behalf to help you connect with Azure billing and subscription management support.
The ticket enables you to work closely with the support engineers and get a quick resolution to your issue.
Hope this helps!
If the response helped, do "Accept Answer" and up-vote it