Hello Nupur Sahu,
Thanks for your question
Your Azure subscription can get disabled because your credit has expired or if you reached your spending limit. It can also get disabled if you have an overdue bill, hit your credit card limit, or because the Account Administrator canceled the subscription.
See what issue applies to you and follow the steps in this article to get your subscription reactivated: https://learn.microsoft.com/en-us/azure/cost-management-billing/manage/subscription-disabled?source=recommendations
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Regards,
Abiola