There is something wrong with buying things with your credit card. If you want to apply for freezing your credit card, you can follow the following methods: 1. If you spend a lot of money for the first time after opening the card, you can temporarily freeze it if you can't get in touch by phone. 2. The credit card merchant is abnormal. For example, there is no credit for using the same merchant or POS all the time, and bank monitoring may have cash withdrawal or similar malicious overdraft. 3. If the repayment date is overdue, it is generally in the case that the last bill is not repaid after calling customer service 1-2 times in February. You can call to apply for temporary freezing of your card, and then call to unfreeze it.