As long as you go to the normal channel to complain, the official side of the education network will come out to solve it. If it really doesn't work, you can also call the hotline 123 15 to make a complaint.

"123 15" is a consumer complaint hotline, which was established by the State Administration for Industry and Commerce of the People's Republic of China on March 15 1999, and then launched on the Internet platform of 123 15.