Tik Tok customer service sub-account cannot receive this message.

First, confirm whether the customer service sub-account of Tik Tok is in the official account list of Tik Tok. If yes, you can check whether the message push mode is set in the customer service sub-account. If not, you can log in to Tik Tok official website to set it up. After changing the message push mode, the customer service sub-account can receive messages.