State Bank Of India [SBI] — purchase not converted in to a no cost emi

Address: 400067

I had purchased a mobile phone Real Me1 for Rs 13, 436.02 on 6th June 2018 from Amazon.in for a no-cost EMI from SBI credit card. However, when I received the billing for the month of June from SBI they had charged me the 100% amount of the purchase and not converted it into a no-cost EMI. When I had raised this up with Amazon they confirmed that it was converted into a no-cost EMI (attached is the billing summary from Amazon).
Also when I had raised this up with SBI they told me that Amazon has not converted this amount into an EMI and they are not ready to accept that. And as 6th July was the deadline for converting this amount into EMI from SBI I had no option than to convert this amount into EMI from SBI with the interest.
Hence I am raising this issue for SBI not converting the purchase in to a no cost EMI.