Attention, unfortunately broken too fast

I bought a total of 6 lamps with 2 LAN Gateway's in March / April 2014 and was also happy at first. Unfortunately, until today 3 of 6 lamps broken. The bulbs I use daily 3-5 hours in the evening, which should not be a problem for a LED lamp. When the first lamp broke, I contacted the seller "IWY Light" and also got a spare lamp. But as my other two lamps were broken, was not even answered me to my question. A lot of money for cheap China goods (personal opinion). For me the purchase of these products was the biggest waste of money in the year 2014th