Beard Butler review for Walmart Marketplace

We've been trying to get registered as a seller on the Walmart Marketplace, but for some reason the program that identifies the EIN we uploaded failed to capture the number correctly, so we stopped our application and emailed support to fix it. We've made several attempts and have received little to no help. Our account is currently inactive and it's taking so long to get responses from their customer service reps. PLEASE HELP!