I am sorry this is still not working, if you would like to continue troubleshooting I would be happy to help.
For returning the docking station for a refund, the dock would need to be shipped back to either Amazon or directly to our warehouse. We can provide a prepaid USPS shipping label for returning the docking station from within the United States. For returning the docking station from outside the United States shipping would need to be covered by the sender, and we can only refund the original purchase cost of the docking station. Please contact me directly via email at ‘email@example.com’ with the subject line ‘Ticket #322598 - Attention Pat’ and I can start the return process or discuss any details.
Based on your description of the behavior, our next step is to get some additional information from your system.
If you would, please keep the dock connected and all monitors attached (even though two are not working) and attach the output of our diagnostic utility PlugDebug ( http://plugable.com/support/plugdebug ) to an email to ‘firstname.lastname@example.org’ with the subject line ‘Ticket #322598 - Attention Pat’ and I can then examine the log files to look for any reason the docking station would not be working with this system.
Alternatively, would it be possible to test the docking station with a Windows based laptop with USB-C port ( for testing the HDMI 2 and HDMI 3 ports the laptop would not need to support HDMI DisplayPort Alternate Mode or Charging ). The DisplayLink software for Windows can be downloaded from here ( https://plugable.s3.amazonaws.com/bin/DisplayLink/DisplayLink+USB+Graphics+Software+for+Windows+9.2+M3.exe ), this is the recommended driver version for Windows 10 as of 2020-11-02. We can use this to determine if there is a fault in the docking station or if the display work with Windows it will help to narrow down the possible causes with in Apple’s macOS.
Thank you, I look forward to your reply,