Flipkart — Product has not been delivered on estimated date

Hi, i had ordered an ASUS laptop from flipkart on 8th of october by paying full payment and delivery date was marked as Oct 11. But later they changed it to oct 14 Saturday. Morning i called the delivery agent and informed him i wont be available can u deliver it post 2-2:30. Due to sone circumstances I couldn’t reach my house on time. When the delivery guy called me i told him to delivery at 5. But he refused he can’t. Then once I reached home i requested him can he deliver now but he said he cant. He also said this product will be delivered the very next day i.e 15oct sunday. But from sunday i’m waiting calling the executive no proper response. Today when i called the executive he said it will be delivered on 20th. U need 10days to deliver a laptop which is fully paid ?? This is so not acceptable.