Hello @kelleri,
Apologies for the issues you are experiencing with the product sync! We would like to help you out as mentioned in your support thread.
The Zettle support can also assist you to restore your products if you do not have an export of them at hand. You would only need to send them a message to get it resolved: https://www.zettle.com/help
Regarding the sync through the plugin, we would be happy to hear from you in a support ticket to resolve the issue for you as well.
Thanks!
Kind regards,
Niklas