I agree with Ms. Pavan Mahulkar. It is Section 54 (8) (e) and NOT (d). I am grateful to her for pointing out my error.
(e) the tax and interest, if any, or any other amount paid by the applicant, if he had not passed on the incidence of such tax and interest to any other person; or
Only solution is refund of credit of IGST into Electronic Credit Ledger.It is a technical lapse and substantive right cannot be denied or forfeited on this ground. There is a plethora of case laws on this issue. The assessee would not suffer such loss.
Refund of credit of IGST cannot be denied/disallowed inasmuch as there is no difference between tax and ITC. Tax paid character is the same whether paid through Credit or in cash. It is a fact that reversal of credit of CGST & SGST and tax paid through DRC-03 in cash has resulted in excess payment to Govt's kitty.
Also go through this case law
2019 (5) TMI 1009 - KERALA HIGH COURT GIREESH BABU ALAMBADAN VERSUS THE STATE TAX OFFICER, STATE GST DEPARTMENT, COMMISSIONER OF STATE GST, DEPARTMENT OF STATE GST, THIRUVANANTHAPURAM AND UNION OF INDIA, REPRESENTED BY SECRETARY, NEW DELHI