Simplilearn — Refund being not processed nor updates being communicated

I had enrolled for CSPO course in Simplilearn Institute.
Course was supposed to start from 05 Mar 2022. But one day before (04 Mar 2022) the course was cancelled by the institute and new dates were proposed. I had reached out to the particular person and informed them about my unavailability on the proposed dates and to take my name out of the course. On 04 Mar 2022, Simplilearn representative for the cancelled course had mailed me regarding confirmation of the same and refund being initiated. It has been more than a month and I haven't received my refund. I have not been given any details (refund ID or ticket No for the issues raised with numerous employees at Simplilearn) or updates regarding the refund process inspite of repeated reminders.

Kindly support to take immediate action.