I first thought that it was a translation issue; but actually it's a software design issue I think. Mine is just an opinion but I should say; "Buy Now" button doesn't actually do what it's name suggests.
As a consumer I would consider "Buy Now" button is a quick way of buying something. If I see a button like "buy now" in a web page; I consider that I could buy that product without so much hassle. But what it happens now is typing your name and phone number; and waiting for someone to call you. And even after that; I still haven't actually bought; what should happen then?
This is in deed not "buy"ing and absolutely not "now".
I think either the name of the button or the way it works should change.