I find it a bit suprising those here are coming to the defense of poor customer service. Its one thing to be a craftsman, but if you are selling somethng that also makes you a vendor and in my mind that comes with a responsibility to polite to potential customers be it in person, on the phone, or via email.
i know when i had my restaraunt i had some VERY wrong and VERY rude customers, but would never treat them with anything other then respect and do whatever i could to please them(which sometimes wasnt possible).
it seems like all the OP needed was help making a purchase or an alternative method. i dont see why this would be diffiuclt