Just now, I had the same experience. When I said our business is closed for the winter, she rudely hung up. I dialed the number back, but it doesn't even ring!
Called our office landline again during work hours and after we answered, didn't say anything and eventually hung up without saying anything. Call ID displayed PROSEZINGDEP.
Rang our business line (which we no longer answer in person).
No message left.
Caller id PROSEZING DEPT
Assume its robo trash calling, illiterate trash at that ;-)