Amazon India — Not giving diffrence amount as promised

I had ordered michelin foot pump for Rs.1951 but as both product & shipping box was damaged i had placed replacement. Again replaced product also had same problem. Both product & shipping box damaged hence i contacted amazon regarding unprofessional behaviour. The executive said that 2nd time replacement cant be done and i have to place a new order. But i said if i place new order i wont be able to get the product in same deal/offer. Hence he assured that as fault is from amazon he will transfer the diffrence amount Rs. 344 which im paying extra for new order Rs.2295. Just to b safe i recorded that call in case amazon denies later. And the same thing happened. I didnt receive any call from them as promised. On contrary i called them twice and had to explain the problem twice wasting my time& energy to ladies executives who were unable to help me hence i had to file a complaint against amazon for not transferring diffrence amount as promised