How to recover hacked Instagram account?

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Hello,

My friends account was hacked on Instagram. They’ve changed the number, email, and user name associated with the account so basically my friend has no way of reverting any of the changes. We tried to follow Instagrams help center and get to the part where it suggests clicking on “need more help” after being unable to access phone or email. But clicking on that just redirects you to the help center and DOES NOT send a secure link code. How do we get that code so they can verify their identity?