Is there apps I can purchase to keep my 411 safe

Norton products won't help.

It sounds like he has access to both your passcode and your Apple ID.

I would suggest that you contact Apple Support for advice. See the following: Contact - Official Apple Support

Also see the following, but I still recommend contacting Apple Support: If you think your Apple ID has been compromised - Apple Support

This is primarily a user-to-user support forum; other Apple users like you.

Put a passcode on it. See the following Apple Support article for information on setting up an iPhone passcode: Use a passcode with your iPhone, iPad, or iPod touch - Apple Support