Amazon & Walmart

We have our products, which are outdoor apparel, specializing in yachting & hunting. All our products are listed on amazon & Walmart. Listings are professionally done, but we sell NOTHING. We need to start selling urgently. Who can help us with that? Please note, I need someone specialized in that, and someone who knows about apparel and outdoor clothing. I spent a lot of money on the previous contractors and they did not know. We are a new brand in the US and are high quality products, but are not the cheapest. I believe that may be the problem too. So if you feel you can help us, please bid! please make sure you are able to do that job!