Jet Airways — not received refund

I had booked the 3 tickets through Inox Holidays. Agent name : Mr. Hiren Makani
Ticket numbers:
A. Mrs. Vaishali Nahata
1.[protected]
2.[protected]
B.Mr.Laleshkumar Nahata
1.[protected]
2.[protected]
C. Ms. Ishita Nahata
1.[protected]
2.[protected]
Kindly, guide how do I proceed?
I will appreciate if you help me in getting my amount reimbursed.

With warm regards,
Dr. Vaishali Nahata