unable to turn off two step verification

2 Step Verification or 2 Factor Authentication?

How do I turn off two-step verification?

1. Sign in to your Apple ID account page.
2. In the Security section, Click Edit.
3. Click Turn Off two-step verification.
4. Create new security questions and verify your date of birth.

You'll get an email confirming that two-step verification for your Apple ID is off.

Apple ID - Two Step Verifications FAQ

Can I turn off two-factor authentication after I’ve turned it on?

If you already use two-factor authentication, you can no longer turn it off. Certain features in the latest versions of iOS and macOS require this extra level of security, which is designed to protect your information. If you recently updated your account, however, you can unenroll for a period of two weeks. Just open your enrollment confirmation email and click the link to return to your previous security settings. Keep in mind, this makes your account less secure and means that you can't use features that require a higher level of security.

Apple ID -Two-factor authentication

What happens when you try? Error message(s)?

there is a contact link.

Apple ID Support

Apple ID Support (2)

Apple Support by e-mail or chat Select your device, Battery, Power and Charging, then Power adapter not working to get a chat option. If the initial contact can’t help you, ask them to have someone who can help contact you.

Apple Support using Twitter

Or fill out and submit this form.
The form is for iTunes, but it will get passed to the ID Support section.

Hi!

I have the same problem. I want to turn off the two step verification (iMac, Mac OS High Sierra). Logged into appleid clicked on edit but saw this (see photo). Little bit difficult (iMac is with dutch language). But I can't click on "twee-factor-authenticatie" (two step verification)...
What to do?!
Martijn.