Customization of the existing online store - open to bidding

The existing online store is applying Opencart 2.3.0.1 with So REVO theme as well xls import/export tool. Here is the customization request: 1) add "vendors" function by applying the same method of existing "brand" with an added up filter for Vendor area. Which means need to add input fields to the backend as well the import/export tool. 2) turn some of the existing banners to "refresh the page to rotate the banners". (capable to click to go to the hyperlink) 3) customization for the footer. 4) existing top menu, have 5 items and "more". capable to click "more" to open a page to list all items of the top menu then to individual pages. 5) backup & move the existing web store to a new cloud server. 6) other minor adjustments such as moving position of banners, delete "more" for product description. 7) dissolve the problem of error 500 while new user registration. Please check from [login to view URL] for the incomplete onlinestore and kindly return by email [Removed by Freelancer.com Admin] or chat.