How to unsubscribe from Unicom's harassing messages?

Unicom anti-harassment reminder service opening method is as follows:

1. Send a short message "KT" to 10655587 to apply for opening, which will take effect immediately. (case-insensitive) Communication fee is 0. 1 yuan/article;

2. Open the service through the official account of "Wo Security" WeChat;

3. 100 10 customer service hotline