Got a call and nobody answer

Received a call from W.N.  Physicians... When I called backI received an automated answering machine stated that I indicated when I was online that I would be interested in job opportunities.I'm online all the time but I don't recall ever applying for or indicating I was looking for a job. Not suee if this is a scam to collect personal data or what. Just be careful if you or they call back.

Don't know this #, probably a scam.  Never answer calls from unknowns.

When I first answered, there was silence for a few seconds and then a guy with a really pissed-off attitude told me he was calling in response to a "survey" I conducted online.  He also said the name of the company he was calling from, but I can't remember what he said.  The connection was pretty bad, but I did ask him about which survey he was inquiring, and he stated he didn't know the "date or time" I completed it.  Then, he said, again sounding very pissed off, "Okay, thank you", and hung up.  Dipchit.  

This must be some sort of prank.  I would avoid answering them if at all possible.