Review on Lamp LED gauss Black Filament Vintage 157802008 golden, E27, ST64, 8 W, 2400 K by Mateusz Marek ᠌

I bought 4 pieces at different times. Two are on fire, one burned out after six months, one after three weeks. That's all the arithmetic. Something inside starts flashing, then it burns, then it doesn’t, it seems to work, but in fact it doesn’t shine (in the photo there is a difference between a normal and a defective lamp). Year warranty! How to return damaged copies?