Write a script on JS API Pozvonim.com

There is a service Pozvonim.com. He has his API. Need to write a script that the visitor on the website leaving a phone number in the form, pressed the button "Book a consultation", and that she then proceeded to call through the service Pozvonim without displaying their widget. Look should be as if the widget is not on the website.


Attached a description of the API, but you can register in the service to view more info.

Write in your response the word: "cabbage" – confirming that you are not a bot
The price is negotiable.