Fix Website

Hello, I need someone who is an expert in WordPress, PHP and MySql. I have an Advertising marketplace for advertisers and publishers. My website needs: A custom built shopping cart. Bitly API integration to track click hit count and design a backend report where advertisers can see their bitly link to see analytics. All major social media API integration to verify accounts and retrieve followers. A shopping cart where advertisers will provide details about the item the buy, provide a message, provide time, upload a banner or picture. Equal size for the listing box. Also, develop a discount bundle feature so Publishers can offer their original listing at a discounted rate. They can either select items from original listings to offer as a discount or offer the whole listing as a bundle. My website has three sections: Marketplace, Featured Listings, Hot Listings. I need a function so after people submit their listing, I can either approve or reject. Once, I approve, the listing will show under the marketplace form, if I reject, it will not show. Then featured listings is a paid area to show listing on the front page. And hot listings is up to my judgement to post some there.