how to stop Two step verfication?

Here, read this link --> Two-factor authentication for Apple ID - Apple Support

You are not going to be able to turn it off.

There are many services on your phone which depend on Two Factor Authentication. If you turned it on less than 14 days ago, you can turn it off, but them some things on your phone won't work as you might like. If you turned it on longer than 14 days ago, you cannot turn it off.

I don't understand what take to stop setting Two step verification means?

How long ago did you turn on 2 Step Verification?

My iphonese1 is broken. My mac is long not updated with Capitan osx And my visa account is expired. I could not add another debit card. What can i do to upgarde the os of the mac.