Ecom Express — Product Delivery of Ecom Express

I ordered a mattress from Amazon and on the delivery date, a call came from a landline number and I attended the call. But due to some network issue I was not able to talk to that person. But when I called back to that number, I was not able to talk to them as it was like a customer care number. But they didnt called me again and a few mins later I got a message that the product was undelivered as the address was unlocatable. The office of Ecom here is around 1km from my delivery address. As I got such a bitter experience from this waste express I strongly degrade the service of this company.