Shopify Marketplace Connect

We really wanted to use this app for managing Amazon, Walmart etc, however unfortunately, despite our best efforts to configure this app properly and to reach out to Support a few times by chat, email etc, there has been no response and this app did not work for us. We wanted this to work and got commitments for a zoom walkthrough etc, however, no one ever returned our messages or emails and the interface and functionality really aren't where it needs to be.