BookMyShow — Partial Refund

I booked a ticket using bookmyshow webapp and added my debit card points as payment method . But after payment, they said there was server error and the amount will be refunded. But they only refunded the rest of the money after I applied my card points . which means that my 1000Rs worth debit card points is lost. I want my debit card points back as BMS cash or any other methods as the problem was in their side .