Domino's Pizza — refund of amount

Address:

560048

On 16 dec i placed 2 order
First order cancelled and refunded amount for that already received
Issue is with second order, it was the prepaid order and at the time of delivery i paid for it because on invoice due amount was mentioned
After few days i talk to the manager he asked me for invoice
He accepted there is mistake from them side
At the time of transferring that order to bridage metropolis bangalore they didn't mention it was prepared
Now manager neither returning the amount neither placing a new order with a that amount