I got f1 visa for spring semester 2016 and I went to Usa to attend the university.But due to some reason I came back to India with in a week without reporting in the University.I reapplied to different university and got admit for summer 2016.So my questions are
1.Do I need to retake my f1 visa interview as I am changing the university?
2.Do I need to pay agin for my sevis or just email them to change it?