I got such a call yesterday. I told him outright this is a scam. He hung up. But another time it was a prank call . Have you gotten one? My son did it. It's prerecorded but sound very realistic with natural pauses in conversation, so i didn't know it was a prank call.
A guy with a thick Indian accent asked if my computer was running slowly. I said yes. (Mind you, I wasn't going to give him any info, but get enough from him to report him. When he became bothersome, i said my son is in IT and can fix any problem. But he THEN said he would be charging my credit card $15 for 45 seconds of professional expertise. I, of course, wasn't thinking how could he without my cc number? And yelled, "oh, no you will not!" And hung up. My son could hear every word and was laughing his head off!