Air India Express — cancellation refund not received

Hi,

I have cancelled ticket on 29th jan for air india express with pnr number: kmuedc from coimbatore to singapore. As per the attached receipt i was supposed to receive 16425.62 inr back. However untill now i have not received my refund cancellation amount. Attach is the receipt that was shared with me by air india confirming that they will credit 16425.62 inr to my account. Please check.