im purchase in redmi 4 32gb delivery is not received

I’m purchase in Redmi 4 32 gb delivery is not received but showing in my account mention in product is delivered, I’m many times calling customer care service is not proper response and helpless team and investigation excutive calling me asking I’m connected call delivery boy but delivery boy is not responding to the call, then asking investigation person your amount is refunded but Amazon customer care service is not refund your money.