Yes, same here. I just got a call from them and didn't answer. I called back and it said it was disconnected or no longer in service. Noticed they called at least once earlier today while I was gone.
I got the same call except I answered it and an automated service asked if the person was available if not they would hold until they were put on. I hung the phone up at that point but decided to call it back and got the same thing telling me the number was not a working number. Very suspicious indeed.