Short answer. Facebook Marketplace banned means selling on Marketplace is blocked. The personal profile can still log in. Screenshot the Marketplace notice and request a review there. If the profile itself is disabled, appeal that login first.
Facebook Marketplace banned is a block on buying and selling in Marketplace. Your profile, your Page, and your ad account can each be fine or blocked on their own. Open Marketplace and read the sentence before you appeal the profile.
Screenshot the Marketplace notice: banned, restricted, or the policy line under it. Request a review from that screen. Say what you sell, in one line, and that you want this decision reviewed. If a listing is named, mention that listing. Submit once.
Send the name on the profile and the Marketplace screenshot. We file through Meta’s own official channels, open support chats, send follow-up emails, and push the case hard until it gets looked at. It takes a few days. Start a case on the contact page. How it works is the three steps. We never ask for your password.