Amazon India — moto g5 s purchase from amazon india during the sale on amazon from 13 th may to 16th may

Address:	Gurgaon, Haryana, 122011
Website:	www.amazon.in

I have ordered a mobile from amazon india moto g5s on exchange of moto e3 power during the recent sale on amazon india on 15th may and it cost me 5310 after exchange of the moto e 3 power and it was to be delivered on 17 th of may as i am a prime customer of amazon and once ordered it reached to gurgaon on 16th of may but on 17th it havent been delivered and when called to customer care they said there was some issue with delivery team and it will be delivered on 19th of may but on 19th they cancel my order and when asked on customer care they told that the social media team had canceled the order and money will be returned back to me in the account but when i again tried to ordered the exchange price of the mobile moto e 3 power has been decreased by 1200 rupees which was 3972 rupees during the sale but now it had been 2793 rupees. And there was no cash back offer on the product. Pls help me in the same and pls help me to resolve the issue.