Medlife — non-refund of cost of medicine cancelled by them

I ordered zobone 4mg injection on 26.2.2020 and paid rs.2399.66 through mobikwik on 27.2.20. On 28.2.20 i received a message that the order was cancelled because of stock issues. They assured processing of refund. Even after 15 days they have not refunded the amount. I told them if there was any problem in sending the amount they can place the amount in my wallet which can be used for future purchases. But no action whatsoever.