Spice Jet Airlines — Delay in refund post ticket cancellation

In Sep'21, PNR F7M3KV was cancelled due to change in flight schedule and I opted for full refund.
Ticket payment ₹6162 was done by utilizing credit shell balance.
Credit shell PNR- RYZDKP
Now as I see, refund amount is not credited either to any of the credit shell i.e. RYZDKP or F7M3KV.

I have been following up for my refund with mail communications still there is no status on Refund amount so far.
I have also checked my savings and CC account statement since this transaction. There is no such credit.

Kindly look into and help to me to get my refund back.