Warning: different dealers - different quality

I had ordered the adapter at adaptare and was completely satisfied. Impeccable quality. Then I have the items ordered the same to me again. I have not paid attention to the dealer's name.
In the second delivery of another merchant a completely different adapter now been included. The quality is underground. From Micro hardly comes to what. Very strong noise. I'm going to return the items.
I did not realize that an Amazon can lead articles on various "real" products. Then that's a matter of luck and the reviews you can save yourself even.