Amazon India — Product not received

I have ordered one Lenovo mobile on 18th from amazon india.Order #[protected].it was under guaranteed delivery with one day.on 19th morning I received one msg product will get delivered today by so so so agent and mobile no is provided.when I called that agent he is telling he don't know his frnd knows..after that 3 days gone.i didn't rcvd my product yet.every time I am calling they r just assuring me.neither they are providing me courier address neither delivery boy no.i already paid 7000 for that phone..from 5 days I don't have phone and I am spending days in huge trouble as I am holding a gud post in govt service.kindly help me in this matter..i am hugely harassed by amazon.they r not disclosing whre is my product.so much in professional attitude.