They claimed to be the IRS when you call them. I called them many times and cursed at them they eventually blocked my number. They even cursed me back. I think their mistake was using a number that you can actually call. It seems to be about 4 or 5 young men with indian accents on the phones. You have nothing to gain from cursing at them except 1) It's justified and 2) They are trying to scam you financially. So it's ok to curse at them. Maybe it'll sink in and they'll rethink their lives or karma will catch up with them.