[Resolved]  Flipkart — without notification cancelled my phone and cheated

I had ordered a MI Note 5 Pro Phone on 5th Nov which was suppose to be delivered on the 11th.

Flipkart had accepted the request and kept sending notification that the item has been dispatched and stuff.
On 10th nob all of a sudden i reveive a sms that my order has been cancelled. WITHOUT IMFORMING ME ABOUT IT.
I received a sms that my order has been cancelled and they have not refunded my amount yet WITHOUT INFORMING ME ABOUT IT
After that i called customer care, what a stupid reason they have given me that all customer have to get change to buy a mobile and this is the first phone which i was purchase from flipkart, i told them, then they check my order and saying i am sorry but i can't do anything, this is not acceptable, i purchased this phn on big billion sale, now why i will pay extra money, sorry is not the solution, flipkart is cheating with customer.If flipkart any any doubt then they have to call me, i ordered my phone on big billion sale, who will bear the loss, this is not acceptable flipkart, i don't need phone i need my mobile.Is this the way to cheat with customer without any reason cancelled the mobile before one day of delivery.Flipkart is cheating with customer first they accept the order and before i day of delivery date then cancelled order with a stupid reason.