Indian Railway Catering & Tourism Corporation [IRCTC] — irctc tdr refund

We have booked 3 tickets 3rd ac from tadepalligudem to bangalore in prashanthi express and journey date was 28th-sep 2016, pnr [protected]. However, only 1 ticket got confirmed and 2 were in rac status, so we tried to cancel before 3 hours time limit, but irctc app didnt allow. So we have filed tdr refund at 1:35 pm which is 3 hrs 25 min before the journey time and the cancellation id was [protected]. But we didnt get the refund and the response from irctc shows that since we have travelled amount cannot be refunded. But we have not travelled and the response is completely false and we feel cheated by irctc. We request for the complete refund of the amount.