Dear Amazon, where is your customer service?

I think the Amazon computers are out of control. I also think that their customer service department (which of course should be the entire company) has failed us this holiday season. This is the letter that my wife just sent to them:

I'm very frustrated right now with your lack of customer service regarding this delivery. Not only did I get a message after 5:00p.m. on Christmas Eve that you would be unable to deliver my groceries at my scheduled time on 12/26/10, I've gotten no response to my reply, so I don't know if the delivery time can be rescheduled or if it just won't happen, and we have other plans on that day that we have to work around. Then I got my usual deliver reminder this morning telling me you would be delivering my groceries tomorrow between 8:00 and 9:00 a.m., and when I tried to call and leave a message, since email obviously isn't getting me any answers, your phone system said that you weren't in and hung up, leaving me no way to leave a voice mail.

This is seriously poor treatment of a loyal customer on Christmas weekend and I will cancel this week's order. Since I have no way to contacting anyone there or making sure you get any messages before tomorrow, I will simply delay all of my items on automatic delivery until next week.

Will you be delivering at my usual time next week or will it be the same deal, me getting notification on New Year's Eve that my delivery on the day after New Year's won't take place?

I suppose that if I get no answer to this query either, I should assume that next week won't be any better and cancel that as well.

This is how Amazon says "Merry Christmas"? I think they can do better than that.