Thank you for your message. I’m sorry to hear that there seems to be a problem getting the adapter working well. I would like to help.
Could you please send the following information to email@example.com? Once we hear back we can better assist.
• Amazon Order ID
• Version of macOS, Windows, or Linux being used on the computer the adapter is being plugged in to.
• Have you tried another network cable with the adapter?
It is possible that this is a driver issue, an issue with the network cable, or with the adapter itself. Having this information will help me to know how best to proceed and to arrange a replacement if needed.