If you have a device with two-step authentication account on the app, you can deactivate it by yourself.
Please refer to the following FAQ.
How to deacitivate the two-step authentication
If you have changed phones or deleted the two-step authentication app, please contact us through the contact form and tell us that you would like to deactivate the two-step authentication.
We will confirm your identity and move on to the deactivation process.