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

Had booked my ticket in IRCTC mobile app for the journey of Mangalore Central to Chennai Central, payment through Payumob using my debit card
Ticket booking date :[protected]
Ticket rate :580
Mode of transaction : Indian Bank Rupay Debit card
PNR Number [protected]

The ticket was on Wait list, so I cancelled the ticket
Ticket cancellation date :[protected]
IRCTC Transaction ID [protected],
I got a mail from IRCTC website that, an amount of Rs. 520.0 has been processed as per below details:
Date of cancellation of E-Ticket/Date of failure of E-Ticket booking:17-Apr-2018
Refund processing date:18-Apr-2018
Refund amount:520.0
Refund reference no:[protected]
Payment Option used : PayU Money M

But till now I didn't got my refund amount to my Bank account. When I see in the IRCTC website, it showing that the ticket is refunded. But I don't have account in pay u mob.
When I contacted your customer service number, no one is responding
Pls check it and help me to get return back of my Ticket refund money
Kindly
Tajudeen A