I agree that it's frustrating to wait all day for a package delivery, but I have to ask what time this chat took place. You said that you'd waited all day, but they confirmed that the delivery would be by the end of the day (7 PM). If they didn't deliver by 7 PM, then I can see the validity of the complaint.

I agree with the others, what exactly do you want training to do? I find nothing wrong with the response. They explained that it would be delivered by 7 PM, and if you wanted a 2-hour window, you would have to pay extra for that enhanced service.