How to cancel harassing text messages from Telecom

First of all, you must make it clear whether the caller ID number that receives the text message is Telecom’s own number, such as 100010, 10086, etc. If so, you can ask them not to send similar messages again. If it is not such a number, Numbers such as 8613**********, 0**********, 106**********, etc., to be honest, there is no chance and cannot be cancelled.