Hi @Pooja Anand , welcome to the Atlassian Community and thanks for your question.
Are you a site or organization admin for your Jira instance? If not, please contact an internal Jira product admin to assist you.
If you are already a Jira site admin or product owner and you can't access your instance, please open a support ticket with Atlassian here - https://support.atlassian.com/contact/#/
Best wishes
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