Bank SMS service charges are deducted several times a year. Why am I always detained?

If it is a card of China Merchants Bank, the SMS notification service fee will be charged monthly, and the next month will be charged monthly. If you owe money because the current balance in the card is insufficient, the system will make up the deduction when the current balance is sufficient. For details, please call 95555-3-5-9 to transfer to manual service for further inquiry.