Every ambassador has a unique discount code, so Shopify's own reporting can break your sales down by ambassador.
In your Shopify admin, go to Analytics → Reports and open the Sales by discount report. Shopify's guide has the details: Sales reports.
One thing to expect: Shopify notes it can take 12–72 hours before sales appear in that report.
If you'd rather not wait, ConvertOut tracks the same sales as soon as the order is paid, and you can export them: How to export sales to CSV.