The Social Security Bureau called to freeze my account.

It's probably a fraudulent phone call. If the other party asks you to transfer money into the card or transfer money in other ways, it is a liar. Fraud gangs always know the personal information of the object before cheating, so it is not surprising that the other party knows your personal information. If this happens again, hang up the phone. If the other party keeps harassing you, call the police so that they won't call you again.