Air India Express — Not get the agreed refund

I purchased doha - kochi ticked from qatar on online (As attached). The ticket confirmation number is bnnugc & the travel date was 12th june 2020. The flight cancelled by air india express due to the covid 19.
The passenger travelled to kochi on repatriation flight on 01.07.2020 boarding pass attached, as the passenger was on visit visa she cannot use the ticket in future.

I sent several email to aie and finally received the replay on 18th february 2021 as below...

From: "manup 1274"
To: "customersupport support", "customersupport support"
Sent: thursday, february 18, 2021 9:41:46 pm
Subject: re: request for the refund of ticket conformation # bnnugc

Dear sir, we will go for refund since the passenger will not use this ticket before 31dec 2021. Please peocess the refund asap.

Sent from yahoo mail on android

On tue, 16 feb 2021 at 2:40 pm, customersupport support wrote: dear sir/madam,

Greetings from air india express.

If you insist on a refund, a cancellation charge of qar 122/- (+30 qar wfee non - refundable) will be levied per passenger per sector and the refund amount will be processed to the account through which the booking was made

We regret we are not in a position to give you a full refund.

We are also pleased to offer you a free date change facility which can be availed for travel till 31st december, 2021.

Fare difference if any may be applicable.

Stay healthy. Stay safe.
Team air india express (Ma)

I sent confirmation email for the refund the same time and received an email from aie as below...

Dear sir/madam,

Greetings from air india express.

With reference to the trailing mail, we are working on your booking in connection with the refund.

Refund amount will be processed to the card holder’s account shortly.

We seek your patience and appreciate your support.

Stay healthy. Stay safe.
Team air india express (Jn)

Until now i didn't received my refund & i sent several reminder emails for the same.

Please do a needful action to get my refund amount.

My email: [protected]@yahoo.com
Mobile phone no: +[protected]