Amazon India — product was return without my permission

Address:	Surat, Gujarat, 394210
Website:	Amazon.in

My email id : [protected]@gmail.com
10 or G 3gb 32gb model ordered at 5999₹ by me on 17 july 2018 and today ( 21/07/2018) was out for delivery and after few our one more msg received by amazon to me is that package was rejected by me and was return to seller without any contact to me
And than i called to amazon toll free number after long discussion they said if seller will return package that they don't do anything about it and i have to order it again.
I was order it in sale days and now that product price id 7999₹ so now after purchase product on 6k and they don't send it and now i have to pay for same product 8k. This is cheating by amazon
And amazon has no control on there seller.
Now i m no loger going to buy products from amazon and i will delete my amazon account soon.
And most importantly i have prime membership of Amazon.