100Bestbuy.com — Item not delivered and no response by customer representative

Myself pn padhi. My mobile no. Is [protected]. I had ordered one iball tablet and one black power house expert on 25th jul 14. By the advice of customer, i made the payment and it was promised that the product will be delivered with in 6 to 7 days. After 7 days when i called the customer care, it was told that the product was despatched on 01 aug 14 and will be delivered with in 7 days. Again when i called on 9th aug, i got the same reply that it will be delivered with in 7 days. Ii am really fed up and i donot understand what to do. Please help me. I had ordered one iball tablet with power bank on 25th jul 14. By the advice of customer, i made the payment and it was promised that the product will be delivered with in 6 to 7 days. After 7 days when i called the customer care, it was told that the product was despatched on 01 aug 14 and will be delivered with in 7 days. Again when i called on 9th aug, i got the same reply that it will be delivered with in 7 days. Ii am really fed up and i donot understand what to do. Please help me. I had ordered one iball tablet with power bank on 25th jul 14. By the advice of customer, i made the payment and it was promised that the product will be delivered with in 6 to 7 days. After 7 days when i called the customer care, it was told that the product was despatched on 01 aug 14 and will be delivered with in 7 days. Again when i called on 9th aug, i got the same reply that it will be delivered with in 7 days. Ii am really fed up and i donot understand what to do. Please help me. Order id is 15165725 Date 25 jul 14 Ref no. 31762799 and 31680221