Significant quality problems !!

Now I write but a separate review. Lights (LED lights) look really very good. But as someone else has already written, many after a day some LED lights out. Note: Individual LED lights can not be changed or exchanged.
On 2nd day 2 Lichterkette was flawed and at the 3 day 3 fairy lights.
Then have 4 lights (prefer a more) reordered from Amazon.
This I then tested the same, so do not completely unpacked but only the plug into the socket.
What can I say, were of the 4 newly supplied lights again 3 incorrectly.
Then I had had enough. Everything returned and courteously again get the credits of Amazon (Amazon had 5 points earned)
I wonder if the manufacturer does not have any quality control? So much scrap should not be. Since I would be really interested in the production country :)
Greeting from poker friend