eBay, Amazon and Website Order management in API/PHP

PLEASE DON'T PLACE BID IF YOU DON'T HAVE EXPERIENCE IN EBAY AMAZON API IN PHP. IF YOU SUCCESSFULLY COMPLETE THIS PROJECT THEN WE HAVE ANOTHER PROJECT FOR YOU. We are bedding manufacturing company and we want to create a website with some basic functionality for Order management and printing eBay, Amazon and Website orders to make work easy for us. It will require the ability to log in with multiple users. We have different eBay or Amazon user ID's. There are lots of websites which currently do this which can be used as examples. One user can add multiple eBay, Amazon and Website in one user account. The website will need to easily be able to accommodate multiple languages through the use of a language table type setup. Part 1 - Design Database As this will be a multi client application we want all users to have a separate sub database within the main data base. It should use a database technology which is scalable and can run on a window server and PhpMyAdmin (We using [login to view URL] hosting). Part 2 – Ebay, Amazon and Website integration For management orders and both eBay, Amazon and website will be using the PHP API Part 3 – Pick List and Dispatch management (IMP) --- One Page for - Bring all orders on one page for pick list Top of the Header - Title with current date Row Line- Order Number, Order item details, Quality and Country (e.g. UK, US, IT) ---- One Page for - Full Orders details page Top of the Header - Title with current date Row Line- Order Number, Order item details, Quality and full Shipping Address In this page select option for uploading shipping confirmation, postage method and Tracking number Part 4 - Basic GUI This will be basic however will need the ability to view current orders, past orders and will have a number of predefined filters with which to sort the orders before printing. There will need to be two different types of documents. One will be a mailing label and the other will be an A4 sheet. There also needs to be a login feature for the different accounts. Our website in – Opencart, Wordpress and Bigcommerce