If you can't regain access to the email or phone number you used to sign up for Instagram, you'll need to log into Instagram and change the email or phone number on your profile with a new email account that you can access. This is necessary to ensure you can continue to access Instagram and to ensure someone else can't gain access to your Instagram account with an email or phone number you no longer use.
Note: Before you begin, make sure you can already access Instagram either with your email, phone number or by logging in with Facebook. If you can't access Instagram and reach your Instagram profile settings, you won't be able to continue.
Once you're logged into Instagram, you can learn how to
change your email from your Instagram profile. If you signed up for Instagram with your Facebook account, your email will be the same as the one associated with your Facebook account. If you didn't sign up for Facebook or Instagram with a phone number, then there will not be an email associated with your account, but you can add one if you want.
After you've changed your Instagram email, both the original email and new email will receive requests to confirm or deny the change.