Sanametrix interview questions

I was contacted by a scammer with an email of mark@sanametrixcareers.com, who offered the role. I confirmed my interest. He sent a questionnaire and job description, which I filled out and sent back. A day later he says I got the position and to email hr@sanametrixcareers.com, which I do because at this point I hadn't revealed any non-public personal information, and they send me the offer document. Since it was still too good to be true and I hadn't talked to anybody over the phone or in an interview or anything, I tried calling the company. No response, left a message. In the mean time sent HR asking some questions. Try calling more, no response, no response a few days later either, and no response to the message I left. Finally I try to email back HR, email not found. Try to email back Mark, email not found. Real waste of my time, not blaming the company but if they had just answered their phone or responded my message it would've been a lot less wasted time. And I still haven't been able to get into contact with them.