Is it useful to complain online every day on 31512315? Did any complaints succeed?

123 15 is just a decoration for mental examination. It's no use, let alone complaining online. Even if you call, it won't work. This thing is usually busy. Even if it is connected, it will prompt: "The seat is busy. Please leave a message after hearing the voice prompt." If you leave a message, it's not just a phone call to fart, it's cheaper for communication operators. Therefore, it is useless to complain, and it is up to you to solve the problem.