My 2-step authentication will not turn off?

You cannot turn it off.

Two-factor authentication for Apple ID - Apple Support

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."

After you've used two-factor authentication you can't turn it off. But if you've updated your account there is a two week period to unenroll. After that two-factor authentication can't be turned off.

Two-factor authentication for Apple ID - Apple Support

You can only turn off Two-Factor Authentication if you have had it for less than two weeks. If it has been less than two weeks since you enabled it, you will need to use the link in the confirmation email that you received in order to turn it off.