Zaakpay.com — irctc ticket refund not credited to bank

I have not yet received refunds of cancelled tickets from irctc for payments made using sbi debit card using mobikwik payment gateway. According to irctc, the refund has bee completed. The following are the transaction details.

1. Amount 755
Refund date as per irctc 04/05/2018
Status: amount credited to bank with reference no. Zp56b3275f8818c

2. Amount of rs 1355
Refund date - 05/05/2018
Refund transaction id - zp56b319af234d4

3. Failed transaction of rs. 1420.
The amount has been debited from my account on 02/05/2018. But the transaction failed on irctc. Refund of the amount has also not been received.
Transaction details : by debit card othpg[protected]irctc noida