Hi lavanya,
No, If you are OC you don't have chance to get fee reimbursement. EWS certificate optional for OC students.
EWS certificate only gives you a special category for entering college like other students who are in OBC.
I hope it helps you.
If you still having issues regarding this you can comment in below.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile