Ixigo — Refund not refunded even though ixigo claims "refund successful"

Ixigo says by giving an ARN number that refund has been successful but I have not received any refund. I contacted ICICI bank and they told me they cannot check ARN number. I was supposed to get the refund amount by yesterday 1st of June. I have not received any refund.
This is my booking ID IF[protected]. RRN/ARN number for

reference -

(74332745151515073321588 and 74332745151515073321612)
In the screenshot you can see the ARN numbers. But the bank says they have not received any amount and that bank cannot access ARN number.

An amount of 11000+ has to be refunded.