Samsung — Mobile Phone Refund

I had placed a order of samsung f12 128gb model from samsung on 6th October.Ihad paid the total amount of 10499 using Paytm.But samsung cancelled my order saying that the payment didn't go through.As the amount had been deducted I decided to call them to initiate the refund.the said that they will do the same in 48 hours.But as I didn't got the refund I call them again and got the same answer.it been 15 days since the cancellation of my order and I am yet to recived my refund.so I request samsung to please do the same quickly.All the proof are attached below.