12306 what should I do if I don't receive the text message after booking the train ticket?

I also bought it today. I didn't receive any text messages or emails. I have received them before ... I think I smoked them today! I waited for nearly ten minutes just now and finally got through, saying that as long as I could find the order, it would be no problem. Don't worry. If you are really worried about the train you bought, you can change it to a different place on the same train ... but you can't change it later, so you can accept it now. I just tried it with obsessive-compulsive disorder ...