The financial company found my number and said that I couldn't reach my relative Qian Qian. Are they illegal?

This is illegal, because it is illegal to steal other people's information.

When an online loan company calls a relative, it suspects that the online loan company has violated the law. As long as 18 years old, parents, relatives and friends are not guarantors, this behavior of online lending companies is suspected of telephone harassment. You can call the police.

Of course, if the phone number you left at that time belongs to your relatives and friends, you should also bear the responsibility yourself. If it has nothing to do with harassing your relatives and friends, it is suspected of breaking the law, but in this case, it is difficult for you to investigate the responsibility, and only paying off the loan is the solution. If the amount is high, it may also involve the other party suing you.