Air India — non refund of cancelled air ticket even after delay of two and half months.

Dear airindia officials,
I cancelled my air ticket (Pnr jrn93) on 05.01.2018. I haven't received the refund amount to the bank account yet. You had replied that the refund transaction has failed at payment gateway bank. It has been more than two and half months by now. Please do the needful as the amount is urgently needed for emergency purpose.
Please do the needful