Sadly, this happened to my father last year, and they were successful charging his debit card $300. He did not give them his PIN, which they requested (he could

Sadly, this happened to my father last year, and they were successful charging his debit card $300. He did not give them his PIN, which they requested (he couldn't remember it). I called Wells Fargo and they were great about just nuking the charge. Had to get a new card, of course, and I immediately made him stop using a PC. I got him a iPad mini, which hopefully helps with those fake "you have a virus" alerts.