I have to say that I understand all of the reasons given. In my case (a company in Edinburgh) they didn't answer E-mails and I couldn't get them on the phone. Very different from Rocky's very public and voluntary information.

I finally got their attention when I asked the credit card company to pull my payment to them for non-delivery. All of a sudden they called and were interested in my business and in keeping me informed as to the nature of the problem. After that experience, I did not allow payment to them until delivery.