Amazon.in — cancellation of my product

Website:

www.amazon.in

On 15/07/2017 i saw a phone named oneplus 6 (Mirror black, 8gb ram + 128gb memory) with prive rs 399/- and i ordered it with one-day delivery which i got free with prime subscription. I also got a confirmation mail by amazon at 9:36 pm. But in the morning my order was removed from "my order" list leaving no trace of my confirmation of my order. And then i got a mail saying that it was their mistake. Then when i called the customer care they started making excuses such as they cancelled it due to rain. Since then i have been trying to get my product at the price i had ordered from them.