Indian Railway Catering & Tourism Corporation [IRCTC] — I'm complaining about a refund that I have not received from irctc and it has been more than 3 months now.

Address:	C/o Jai Prakash Narayan Sinha, Sadaquat Ashram, Bihar Pradesh Congress Commiittee campus, Patna-800010, Patna, Bihar, 800010
Website:	IRCTC

I was booking a tatkal ticket from Bangalore to Patna on May 5th 2019. The amount was Rs 3845.5. The amount was debited but as I was not alloted a confirmed berth, the ticket got cancelled. I did not received the refund for the same. I have been contacting their customer service regarding this and still there is no solution. What can I do?I have been sending them bank statements to and forth without any resolution. They sent me a mail first off that refund has been processed on 8th May, 2019 but I did not get any refund. I am providing bank statement below and also the transaction details
Transaction ID: [protected]
Refund Amount: 3845.49
booking date: 05-May-2019