Byju's — Overpayment reimbursement

I bought byju in the month of April and EMI was set to be deducted from June onwards however on 25 may i had paid the full amount via credit card. And journey started here of such poor services they offered.

The EMI which supposedly stop, continously deducted for june, July and August, after long struggle somehow I make the LOAN to be cancelled.

Now the story take further turn.. From September onwards I am request them for refund of 18, 021/- rupees but they guys are too ###... They do not want to refund me... I

I am continously calling and sending email on Regular basis but they are not ready to refund..

Plz help if you can to get the refund.
.