My short message function was disabled, and I called many times to report that I would call back to help me solve the problem. But I called back and asked me to take the card to the counter.

Generally speaking, it is the mobile company's own judgment. They have a system to automatically judge whether the messages you send are spam messages, advertising messages, marketing messages, etc. If the short message you send contains any marketing information or spam, they will think you have this possibility and they will stop your short message function. If you unlock it, you must take my ID card to the business hall and sign the agreement at the same time. To put it bluntly, you are on the list of key concerns, and you'd better deal with it.