What should I do if my application for the original school is refused after studying in the United States? urgent

In fact, your mistake is that at the beginning, you should not come back after transferring from B 1 to F 1, or you should come back after reading B 1 and apply for a new visa for F 1. This way of changing identity in the United States is much easier, but it will leave questions for visa officers.

Of course, we can't pursue these now, we can only make efforts in the current situation.

First of all, you have your last visa B 1 on your passport, and at the same time bring a letter from the Immigration Bureau allowing you to extend your stay. This can prove your legal residence status in the United States.

Secondly, the purpose of going to school is not clear. To put it bluntly, the visa officer suspects that you have an immigration tendency (is it 2 14(b)? )。 This is more serious. How to prepare the materials and how to answer the questions depends on your personal situation. You can't say it blindly. I suggest you spend some money to find a better visa consulting company, tell them about your situation, and let them guide you on what materials to add next and how to answer questions, so it may be possible to reverse the case.

The visa consulting company will see which city you are in. Look for newspapers, websites, forums and the like.