No form and no calendar link. Write to us and you will get a considered reply from a person.
We reply to everything, including where the answer is no. If we are not the right people for what you need, we will say so rather than prolong it.

None of this is required. It just saves a round of questions.
The role, the approximate compensation, and whether you are the person running the hire. If you are replying to something we sent, a reply is enough.
The field you place in, the regions you cover, and the titles you fill most often. It helps to know which companies you would rather we did not approach.
Usually the same working day, and within two at most.
Primarily the United States, with some work in Canada.
We use what you send to reply to you, and nothing else. The privacy policy spells out the detail.