This is another IRS scam,, I personally had my own fun, I was bored and constantly recalled them for an hour, exerting the fact they were a scam,  My words were "ALL DAY,  I CAN DO THIS TO YOU ALL DAY... "  then hung up I actually had my daughters tag team me with their phones to see who could get through the most.  >:)  why should they have all the fun.  Tied up this same guys phone line for a good while,  then they blocked OUR numbers.