Opencart store development with customisation

Need an opencart ecommerce store development with following customizations 1. Responsive design implementation (we will select & buy theme as required) 2. Indian SMS Gateway integration with alerts on every stage to customer & administrator and mobile verification via otp on registration. We will provide API documentation to be implemented 3. While placing the order by customer, order should go to pending status and a provision for discussion by customer to site admin needs to be provided. Once admin finalises the discussion with user He will approve the order , order will move to approved status 4. Once order is approved customer will make offline payment via bank deposit and customer will have a provision to fill payment information form. Once admin receives the payment he will confirm the order than order will move to "confirmed" status. 5. Once payment confirmed order details will be sent to production department through email and a login for production department to be provided where they can check all orders. In this stage order status will be "under production". Once order is ready they will change status to "order ready" 6. Once order status changes to "Order ready" details will be sent to dispatch department". They will have list of all orders that are ready. They will dispatch the item and update shippping details in same 7. Order status bar to be displayed to customer liek happens in flipkart, snapdeal etc 8. A dynamic flip book option for updating catalogues with zoom, sharing, print, email option 9. catalogue option for each product to be downloaded in PDF 10. White label opencart admin panel access with limited functionality for store owner Apart from that few minor customisations are needed with opencart functionalities such as login to see price, quantity discount etc This should be done with provision to make multisite website later Need to start with project as soon as possible and finish sooner.