Hello @Ranjan Gautam ,
Thank you for reaching out to the Microsoft Q&A platform. Happy to answer your question.
Check to see if you need to upgrade your old subscription or remove your restrictions, read this document https://video2.skills-academy.com/en-us/azure/cost-management-billing/manage/spending-limit
If not, please provide more detailed information about your subscription.
Important Points:
When your usage results in charges that exhaust your spending limit, the services that you deployed are disabled for the rest of that billing period.
For example, when you spend all the credit included with your Azure free account, Azure resources that you deployed are removed from production and your Azure virtual machines are stopped and de-allocated. The data in your storage accounts are available as read-only.
If your subscription type includes credits over multiple months, your subscription is re-enabled automatically at the beginning of the next billing period. Then you can redeploy your Azure resources and have full access to your storage accounts and databases.
Azure sends email notifications when you reach the spending limit. Sign in to the Azure portal to see notifications about subscriptions that have reached the spending limit.
Hope this helps.
Please "Accept as Answer" and Upvote if any of the above helped to help others in the community looking for remediation for similar issues.