Kforce Manager interview questions

Kforce called me by finding my resume online. They asked me to apply for a local position and arranged a meeting with the hiring manager. The interview went well and I quickly received an offer. I requested a day to think about it. The Kforce representative said, I will notified the client you refused the offer and will send other candidates in." I found this very unprofessional and the whole process fell apart. My Kforce representative was high pressure and demanded I disclose information from a non-disclosure agreement. When I refused the job offer was rescinded.