In aug-2020 exports have been made with IGST by us from JNPT, but by oversight in GSTR-1 shown it as letter of undertaking, during month of Sept-2020 error has been rectified through table 6A and the system also accepted but till today we could not get the refund of IGST. We enquired at ICEGATE, book the ticket but they are telling us that first scroll have to generate from customs and only than after refund can be release. contact made at JNPT over call and mail but could not get the result. Please guide us what we have to do for the IGST refund. Thanks