MakeMyTrip.com — Refund not received

Website:

makemytrip,com

I have not received refund amount. I changed the date of my flight from 15 Jan. 2022 to 09 Feb. 2022. The booking ID for the original flight and the changed date was the same, it was NF25LOEZKE3NABLZ7149. I took a flexi ticket when I booked my flight ticket so there was no charge for the date change. I paid 7983/- for my ticket and when I changed my flight date, since the 09 Feb. flight was cheaper, I was supposed to get a refund of 3263/-. I’ve tried to call the toll free numbers and the numbers listed in their website, but it all comes back as invalid numbers. Kindly refund it as soon as possible.