Safexpress — Product not deliverd

I ordered a product from Kent and it was to be delivered by safexpress it has reached my city on 18th April but it is not delivered till now. In the tracking menu it is showing that the product was undelivered
But I didn't received any call from any delivery boy when I tried calling customer care on 20th April he said that product would be delivered next day but it wasn't delivered I called customer care again the next day he said the same thing again and now when I am calling the customer care no one is picking up the call.