Air India — Refund stated given by Air India not received in Bank account to which it should have been received

I had cancelled two tickets for a flight on 10 December 2020 booked on 24 November 2020.The cancellation was done within 24 hours i.e. on 25 November 2020.I was told to expect the full refund within 41 days of cancellation..
Next I contacted Air India twitter account asking for refund on 16January 2021 whose reply I got on 21January 2021 expressing apologies for the delay.On 25 January 2021 I received a direct email from [protected]@airindia.in stating they would refund my money within 2 to3 weeks. Despite having given this statement no refund was received in my bank account with the passage of time.

I again tweeted them on 22 Feb 2021 where I got the response immediately that the money was refunded by Air India on 28 January 2021.

After checking the bank statement it was seen that no money was refunded on 28 Jan followed by entire week till today. When my brother went to the Air India office on 18th March 2021 with the bank statement and all other required details I received 2 emails which is attached here showing the amount of the ticket individually. These mails don't contain the reference no. required to check the credited amount in the bank. He was asked to enquire about the same on [protected]@airindia.in .But haven't received any response from this mail also.
The passenger names of the cancelled tickets were Ravindra & Malathi Khanapurkar with ticket numbers[protected] &[protected] respectively.

Hence I request you to please provide the reference no. of the transaction done by AirIndia where in its claimed the amount was credited in my bank account by Air India.

With this I am attaching the Screenshots of Twitter chat which include the Ticket Numbers, Air India Tickets & Air India e mail I Received on 25 Jan2021, my bank statement for that particular date when it was claimed by Air India that the required amount was credited in my bank account ..

Thanks & Regards,
Himanshu N. Karkhane