Amazon - Refund not sent in my bank account after promising and forcibly sending refund in Amazon pay balance

I ORDERED A PRODUCT FROM AMAZON AT RS *** WHICH WAS CANCELLED BY THEM PROMISING THAT I WOULD GET A REFUND OF WHATEVER PRICE DIFFERENCE BECAUSE IT WAS LOST ON SHIPMENT AND PRODUCT WENT OUT OF STOCK AND NOW WHEN PRODUCT CAME BACK IN STOCK I ORDERED IT AT HIGH PRICE RS *** AND BEFORE ORDERING I CHATTED WITH THEM AND THEY AGAIN PROMISED TO GIVE DIFFERENCE IN MY BANK ACCOUNT BUT TODAY THEY DISAGREE AND FORCIBLY REFUNDED IT IN MY AMAZON PAY BALANCE BECAUSE I WILL HAVE TO BUY AGAIN SOMETHING FROM THEM ONLY . THEY HAVE BECAME FRAUDSTER . I NEED A COMPENSATION IN MY BANK ACCOUNT DUE TO REPEATED TROUBLES PROVIDED BY YOUR ASSOCIATES . MY NAME IS PRANJAL SHARMA