Amazon Company — regarding not deliver my order samsung a6 plus and their instant refund as per offer given by you

Sir i order samsung a 6 plus on 10 oct 2018 but still today i cant get my phone even i full paymwnt done through sbi visa debot card on 10 oct and as per offer given by you. I get instant discount of my payment but till 19 oct 2018 neither i get my order nor i get instant dicount credited in my account please send my order and instant discount cashback to my account as soon as possible
Thank you