Ignore them even if they guessed certain things about you correctly.
In the same way we know magic tricks are fake, we should also consider fortune telling to be fake. Ignore or block people guessing your real identity, even if they guessed correctly. For instance it doesnt take a a genius to guess you are likely wearing a grey shirt and sweatpants right now if you are on your home device, and there are only so many ethnicities to choose from (african american, caucasian, asian [most likely chinese statistically]) there is a 1 in 3 chance of guessing someone’s general ethnicity right.
Phishers use these juvenile magic tricks to social engineer their scams.