I sent KTBXLL to 100 10. Why hasn't it been unsealed or the network can't be opened?

Tencent Wangka will automatically turn off the Internet access function and turn it on when the traffic reaches 40G next month. To unseal, you can send a short message "KTBXLL" to 100 10, or unseal. Similarly, through the mobile phone business hall client: service-inquiry-my basic information-unlimited traffic capping, 40GB capping will be lifted, and there will be SMS notification after successful processing. Or call 100 10 to take off your hat, and then continue surfing the Internet. All traffic will be charged according to the daily subscription fee.