What law enforcement or who can I call for neighbor hacking my iphone 1

Unless he installed a "jailbreak" on your phone, he's not hacking your iPhone.

To be safe, start by following these steps:

If you think your Apple ID has been compromised - Apple Support

Next, be methodical; tell us what failures you are seeing when you try to update:

If your iPhone, iPad, or iPod touch won't update - Apple Support

If you feel this is too much to work through alone, make a Genius Bar appointment and they can help you further:

Genius Bar Reservation and Apple Support Options - Apple

Finally, you may want to consider contacting local law enforcement as the threats your neighbor is making could be considered harassment in its own right.

The follow these instructions→Restore your iOS device to factory settings - Apple Support, specifically the instructions for restoring with a computer, and don’t restore a backup unless it was made before he had possession of your phone.

THEN RESTORE THE PHONE TO FACTORY SETTINGS AS I POSTED AND THIS WILL ALL GO AWAY!!!!! It doesn’t matter what is on the About page.

And it’s more likely he’s planted bugs in your house or has hacked your Wi-Fi router than he has hacked your phone.

The FBI can’t hack your phone, so it’s highly unlikely that your neighbor hacked your iPhone unless your neighbor had physical possession of it for about a half hour while it’s screen was unlocked.