Amazon — Fraud :Delay in delivery

As I'm prime customer of amazon. I hv order product on 29 July and was promised that it would delivered on same day. Its been 3 days its not delivered yet and even after calling several times their wasn't any proper response from them. I was promised to receive callback from them but received any update yet.
False commitment where given by employees that product will be delivered by End of day where the product wasn't marked for out of delivery then how did the employees give such a commitment.