Goibibo - Refund not issued against cancelled trip

On *-June I tried booking train tickets via GoIbibo app while the money was deducted the booking could not be made as confirmed by the app on the same day. The app further showed that the refund is being issued and it should get credited by **-June. Unfortunately that never happened. After I called them multiple times they assured me that the money will be credited within ** hours while it never happened. Finally they told me to share the bank statement to prove I did not get the money back on **-June but they still did not issue the refund. Recently when I again called up they requested for the Credit Card Statement which was again shared but no luck still. Now when I call they just keep on shifting the calls and finally tell me that they are opening a ticket that will get resolved in ** hours. I have also addressed their grivance mail id but no luck still. Please help!