My iPhone screen is showing as negatives. I have reset the accessibility/display invert several times and have restarted my phone several times. No joy, please help

You can try a clean install of your device after a factory reset:

First make sure you have a backup

How to back up your iPhone, iPad, and iPod touch - Apple Support

Then factory reset your device:

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

And set it up without a backup. See if the issue persists.

If it still does not work it is a hardware issue and will need service:

Contact Apple for support and service - Apple Support

If that solved it there was a software issue. Try restoring the backup and see if it still works.

if that made the problem come back the backup is the problem

Good luck!

That was quick!

Happy to help! :)