Hii,

First, get in touch with your school or college office right away if your course was accidentally changed. Make it clear to them that you wish to reverse the course change that was made by mistake. They might ask you to send an email or complete a form.

Keep all of your documents, such as your ID or admission papers, ready. Until your course is corrected, carefully follow their instructions and consult them frequently. Take prompt action to avoid missing any deadlines.