Incredibly bad delivery experience

I am extremely unhappy with the delivery service of RAM. When placing my order, I was told delivery would take place between 8AM and 5PM, so I used my work address as I am at work during those hours. Yesterday they were unable to deliver before 6PM. Driver arrived at delivery address at 6:35 after I spoke with control room stating I only work until 5PM and that the delivery is urgent. Needless to say, delivery was unsuccessful. Today, the parcel was just never sent out for delivery. The warehouse is literally a kilometer away from my delivery address. How is it possible that you are unable to deliver before 6PM? I am now paying a contract on a device that is supposed to be delivered, but because you can't deliver something to an address a kilometer away before 6PM I am paying for something you are unable to deliver. This is extremely unacceptable and I am beyond disappointed. How difficult can it be to just deliver something a kilometer away before 5PM?