Salesforce Shipstation Integration

Has anyone here set up a Salesforce Store in Shipstation and integrated the two? I think I have the technical part of the Integration completed but I'm a bit stuck on what to do next. I can create Orders in Salesforce but they are not syncing to Shipstation.

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This is urgent for my company to resolve and we would be willing to pay someone who has done this before to help us out (typical contractor rates). If you or someone you know might be able to help, please reach out.