What message can I send if I cancel 106588070 parenting manual?

You can call 10086 customer service to cancel.

However, I have encountered short messages before, starting with 106, always sending me activities and products to develop children. This is not a service. Almost harassment. Later, I called 10086 to block the message of this short message number. It was equivalent to blacklisting the sender, and I didn't get it later. You can try. If it succeeds, please give it to me. Oh, thank you!