you run into these issues with ANY HID company, i have even seen people that spend hundreds of dollars of Phillips brand German HID's and still bulbs or ballast burn out. i saw on another forum that someone received a used bulb with some milkish looking stuff inside the bulbs from one of the preferred vendors of this site.
i guess the point i am trying to make is **** happens, especially when you buy cheap chinese products. that being said if you want to continue to buy cheap chinese kits, then look at seller Clearviw Digital on Amazon.com, i have had good luck with them and their shipping is prompt. unlike DDM which is rubbish.