More and more scams and attacks are happening over the phone. Whenever you get an urgent phone call on the phone pressuring you to do something (such as a caller pretending to be the tax department or Microsoft Tech Support) be very suspicious. It's most likely a scammer trying to trick you out of money or pressure you into making a mistake. Protect yourself, simply hang up the phone. You are not being rude, the person on the other line is trying to take advantage of you.