Had somewhat similar experience... 2014/2015 maybe. Unsolicited call out to me, asking me to interview. I had a couple of questions - one of which included salary range. I was being expected to go take days off and fly to them, but they wouldn't give me even a basic range. Nothing. I declined to go further.

I told someone who then said "well... that's not the way you get a job!" And I said "but... I didn't want a job. They called me. They wanted a worker, but wouldn't do me the courtesy of basic information before I was to drop whatever I was doing and come running to them on their timetable".