American universities have always been rigorous in their studies and attach great importance to academic integrity. Once they are found cheating in exams and writing papers, they will face severe punishment and even be expelled. Every year, the exam questions in the school are generally similar, so there will be sample papers. If it is similar to the sample paper, it is easy for the teacher to suspect plagiarism or ghostwriting. The teacher also knows your language level and your usual writing style, and can decide whether the paper is written by yourself. You'd better find a local white lawyer now, collect evidence in your favor, and then appeal. If the appeal is successful, you can keep your student status and continue your studies.