Shopify + Amazon Product Listing Specialist Needed ASAP

I’m looking for someone experienced with Shopify and Amazon/KDP product listings to help troubleshoot and optimize my online product setup. I currently have a product listed on Shopify, but payments are not working correctly. I need someone to take a look at the backend, identify the issue, and make sure customers can successfully purchase the product. Shopify product link: https://allison-retina.myshopify.com/products/artist-vision-workbook I also want to list the same product on Amazon. The Kindle version is already available here: https://www.amazon.com/dp/B0GZD8SKVC However, when I tried to list the physical/product version on Amazon, I ran into an issue with the page count/page requirements. I need someone who understands Amazon/KDP or Amazon product listings and can help me resolve this. Scope of Work I need help with: Reviewing my Shopify store and product page Troubleshooting why payments are not working Making sure checkout is fully functional Optimizing the Shopify product listing for clarity, conversion, and professionalism Reviewing product photos, description, pricing, and checkout flow Helping list the product on Amazon Resolving the page count/page requirement issue for the Amazon listing Making sure the Amazon listing is properly formatted and ready for approval Advising on whether this should be listed through Amazon KDP, Amazon Seller Central, or another appropriate route Product The product is the Artist Vision Workbook, a creative workbook currently available on Kindle and listed on Shopify. Ideal Candidate Please apply if you have experience with: Shopify setup and payment troubleshooting Shopify product page optimization Amazon KDP and/or Amazon Seller Central Listing books, workbooks, journals, or digital/physical products on Amazon Fixing listing errors or formatting issues Creating a smooth customer purchase experience To Apply Please send: A brief summary of your Shopify experience Any experience you have with Amazon/KDP product listings Examples of Shopify or Amazon listings you’ve worked on, if available Your turnaround time Your rate for this project This is needed ASAP, so please only apply if you can take a look quickly and help get both platforms working properly.