I can't say much here that hasn't been said. All of the service reps are overseas. Every time you reach out for help you have to submit a form, schedule a call or email response, and wait. After waiting they say something like "we know how frustrating it is..." then they never answer your question. They tell you to look at a help page which doesn't cover the issue you're having problems with. I've tried troubleshooting submissions by using hundreds of variations of their "easy to upload" spreadsheets. None of which worked. I've patiently lost months of my life with the promise that it would finally work. Selling on Amazon is absolutely not worth it. I don't understand how anyone does anything. Save yourself the headache and mental anguish. Avoid it at all costs.