Hi

If the payment is debited twice you need to get in touch with the JAM help desk either through call or mail.

https://jam.iitr.ac.in/contacts.html

To request for refund, the applicant has to send an e-mail to jam@iitr.ac.in with the subject line 'request for refund' and with the following details: 1) Name, 2) Application No., 3) Transaction ID, Date and Time.

They may take time to revert back.

Hope this clarifies!