How can I take hacker out of my apple phone

Follow these steps to secure your account - If you think your Apple ID has been compromised - Apple Support

If you haven't already, you should do the following as soon as possible:

• Change your Apple ID password.
• Change all of your financial account passwords, and report that your identity may have been compromised to each of these financial institutions.
• Restore your iPhone to its factory default configuration which will completely erase the phone to remove any nefarious apps that may be running on it.
• Report this incident to your local law enforcement agency.

Ref:

• Manage and use your Apple ID - Apple
• If you think your Apple ID has been compromised - Apple Support
• How to see if someone else has access to your Apple device or account - iDB