They pretend to be the tax bureau and send you text messages, which means that they can give you a tax refund, ask you to provide your card number, name and phone number, and then set a trap for you to get in. If you get in, you will cheat your money.
What they say is nothing more than taking advantage of human weakness and all want to get a refund or extra money. If you believe it, it will lure you to follow their routine, give you an excuse to refund money, let you transfer money to them or follow their ideas, and eventually cheat you.
As long as you keep a calm, rational and calm mind, if you don't believe them, they won't be any danger to you, and you can't be cheated of a penny.
If they are exhausted, you should not give them a penny, nor give them your card number and password.
If you have, don't give them the verification code you received.
As long as you keep your verification code tight-lipped, it's no use killing them.
Slowly, they will give up trying to lie to you.
If you are free, you can also pretend not to be awake and play a cat-and-mouse game with swindlers, taking up their time and energy and indirectly protecting others from fraud.