Amazon India — complaint about amazon policy / customer service

Address:	New Delhi, Delhi, 110059
Website:	amazon.in

I ordered one Nokia 6 mobile through Amazon.in which was delivered to me on 11th Sept 2017, I checked mobile and found a big drawback that in Hybrid slot I can't use 2 Sims & memory card together. I have a data of around 30 GB which I want to move to my new phone and I have 2 different numbers which I distributed to my clients, friends & colleagues so I have to use both the SIM.
Also phone performance is worst, getting heated up, laging issue while playing the games. I complaint for this product and want refund of the money, I spoke to Amazon customer support supervisor (Mohd. Mustafa) who assured me that this time they are going to change the phone only if problem comes with another handset then they will initiate the refund without any question. I got another handset on 16th Sept and got the same problem & when I spoke to Amazon customer support they changed the words and said our engineer will come and test the phone and on basis of his feedback they will take necessary action. I never see such kind of pathetic customer support in my entire life. Amazon.in follow the policy which is beneficial for the organization not for customer. I will never buy any product from Amzaon now onwards. Worst company in the world..