Why didn't the municipal hotline inform you by SMS?

The municipal hotline reported that there was no SMS reminder, but interception was set. According to relevant information, a blacklist of SMS security software is set up. Interception rules were once set in short messages, and the user's own mobile phone number was blocked by the system. This kind of notification message is complained by operators as spam message, which makes the message blocked. You need to contact the operator to solve this problem and set the unlock.