Byju's — Refund not received

The refund of ₹83, 961 that was processed by THINK AND LEARN PRIVATE LIMITED (BYJU'S) on September 1, 2023. As per the transaction details provided to me, the CMS ID for the refund was CMS[protected].
However, it has been more than 20 days since the refund was processed, and I have not yet received the amount in my account.
I have been following up for the last one week but have not gotten any proper response.